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1 see 2 do 3 drink 13 fall 4 bring 14 fly 5 sing 15 take 6 make- 16 give 3b Grammar • Present perfect vs Present perfect continuous 1 Write the past participles of these verbs. * 11 arrive - 12 swim- • have been - have gone 3 Fill in the gaps with have/has been or have/ 1 has gone. * A: Is Patrick there? B: No, he supermarket. 2 A: David speaks Spanish very well. B: That's because he 1 to the 2 to Spain many times, 3 A: Can I talk to the kids? B: I'm afraid they aren't here. They 5 เค 7 catch 17 read to the park. 8 ring 18 hear 4 A: Where's Jack? 9 leave - 19 find B: He's not here. He 10 feed 20 come to his friend's house. 22 (just/come) (not/be) to Spain yet. (shop) 3 Jane all morning and now she's feeling tired. (live) 4 She in Ireland since 1999. 4 5 The author (write) 1 a lot of best-selling novels. They haven't booked their places at the camp already / yet. 6 (he/buy) 2 She has for / just come in. gifts for everyone? 3 Julie has yet / already gone to sleep. 7 Kim (win) 4 It hasn't rained just / for three weeks. two gold medals so far. 5 8 Peter (not/call) yet. Don't come in here! I've just / yet cleaned the floor! 9 (you/find) 10 the car keys? a table for Dad's birthday? (Peter/book) 6 He hasn't been to his grandparents' house already/since last summer. 7 Ed has lived in Russia for / since 1995. 8 11 12 How long in this company? WORKBOOK (you/wait) long? (John/work) Has Frank left yet / just? 9 I haven't talked to him since / for days. 2 Put the verbs in brackets into the present perfect or the present perfect continuous. * 1 Harry home. 2 We 6 A: Where do you want to go today? do B: Let's go to the zoo. We not long time. there for a • just - yet - already - since - for Circle the correct words. ✶ 5 A: Have you visited Rome? B: No, I haven't. But my sister there. She left a week ago.

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FIRST CONDITIONAL REAL POSSIBILITY IF CONDITION PRESENT SIMPLE If she studies hard RESULT IF RESULT WILL/WON'T+BASE VERB she will pass the exam CONDITION WILL/WON'T+BASE VERB She will pass the exam PRESENT SIMPLE if she studies hard We use the first conditional when there is a real possibility that this condition will happen in the future. Exercise Write the verbs in brackets. Use the first conditional. 1-1 (stay) at home if it (rain) this afternoon. 2- If my brother, (go) abroad, I (be) very worried. 3- You 4- Melissa (not earn) enough money if you (can) to go out later if she (not work) more hours. (not finish) her homework 5-If1 (go) to the supermarket later, I (buy) some tomatoes. 6-Peter (get) wet if he (not take) an umbrella. 7-Ifi (find) the book you lent me, I (give) it back to you. 8-They (be) angry if we 9-What 10-Many workers 11-1 12-If he 13-My uncle 14-If you 15-Sandra, if you (not visit) them next Saturday. We promised to go. (not go) to work tomorrow? (happen) if you (lose) their jobs if that factory. (not buy) a bigger house if I (not finish) the vegetables, he (can) to go to the opera if he (close) down. (get) promoted at work. (not have) a dessert. (not remember) to get the tickets. (not taste) nice. (be) late for the meeting. (not put) sugar in your coffee, it, (not hurry up), you 16-Cristopher (be) so happy if he (find) the money he lost. 17-Your motorbike: (not break down) if the mechanic (check) it. 18-if you (not take) an aspirin, your headache, (not disappear).

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Home work 1 1. A circuit is made up from 4 resistors of value 20, 40, 50 and 100 connected in parallel. If the current is 8.6 A. find the voltage drop across the arrangement and the current in each resistor (1 decimal place). 2. One resistor group consists of 40, 60 and 80 connected in parallel and a second group consists of 30 and 60 in parallel. The 2 groups are connected in series across a 24 V supply. Calculate (a) the circuit current, (b) the P.D. across each group and (c) the current in each resistor (all 2 decimal places). 3. Two resistors of 60 ks2 and 40 k2 value are connected in series across a 240 V supply and a voltmeter having a resistance value of 40 k is connected across the 40 ko resistor. What is the reading on the voltmeter (2 significant figures)? 4. Two groups of resistors A and B are connected in series. Group A consists of 4 resistors of values 20, 40, 60 and 80 connected in parallel and group B consists of 2 resistors of values 100 and 150 in parallel. If the current in the 40 resistor is 1.5A, calculate (a) the current in each of the remaining resistors, (b) the supply voltage and (c) the voltage drop across the groups A and B (all 2 decimal places).

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EXAMPLE 9.1 Water Treatment Facility #3 Case The situation with the location and construction of the new WTF3 and associated transmission mains described in the chapter's introduction has reached a serious level because of recent questions posed by some city council members and citizen groups. Before going public to the city council with the analysis performed last year, the director of Allen Water Utilities has asked an engineering management consultant to review it and determine if it was an acceptable analysis and correct economic decision, then and now. The lead consultant, Joel Whiterson, took engineering economy as a part of his B.S. education and has previously worked on economic studies in the government sector, but never as the lead person. Within the first hour of checking background notes, Joel found several initial estimates (shown below) from last year for expected consequences if WTF3 were built. He realized that no viewpoint of the study was defined, and, in fact, the estimates were never classified as costs, benefits, or disbenefits. He did determine that disbenefits were considered at some point in the analysis, though the estimates for them are very sketchy. Joel defined two viewpoints: a citizen of Allen and the Allen Water Utilities budget. He wants to identify each of the estimates as a cost, benefit, or disbenefit from each viewpoint. Please help with this classification. Economic Dimension 1. Cost of water: 10% annual increase to Allen households 2. Bonds: Annual debt service at 3% per year on $540 million 3. Use of land: Payment to Parks and Recreation for shaft sites and construction areas 4. Property values: Loss in value, sales price, and property taxes 5. Water sales: Increases in sales to surrounding communities 6. M&O: Annual maintenance and operations costs 7. Peak load purchases: Savings in purchases of treated water from secondary sources Monetary Estimate Average of $29.7 million (years 1-5, steady thereafter) $16.2 million (years 1-19); $516.2 million (year 20) $300,000 (years 1-4) $4 million (years 1-5) $5 million (year 4) plus 5% per year (years 5-20) $300,000 plus 4% per year increase (years 1-20) $500,000 (years 5-20)

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Dimensional Analysis Practice 1. 261 g →> kg 2. 3 days seconds 3. 9,474 mm cm 4. 0.73 KL →L 5. 5.93 cm³ → 3 m³ 3 6. 498.82 cg mg minutes 7.1 year 8. 4.65 km → m 9. 22.4 kg/L to kg/mL 10. 0.74 Kcal/min to cal/sec 11. 1.42 g/cm² to mg/mm² 12. 9.81 m/s² to ft/s² 13. 8.41 g/mL to Kg/L 14. 8.24 g/cm² to mg/mm² 15. The total amount of fresh water on earth is estimated to be 3.73 x 108 km³. What is this volume in cubic meters?

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โรงไฟฟ้าถ่านหินมีการทำงานตลอด 24 ชั่วโมงใช้ถ่านหิน 10,000 ตัน/วัน ในถ่านหินมี S ปนอยู่ 5% เมื่อเผามีกำมะถันปนในเถ้า 1% จงคำนวณความเข้มข้นของ SO ที่ระยะ 3 กิโลเมตร ใต้ลมระดับพื้นดิน สภาพอากาศช่วงฤดูร้อนตอนบ่าย (class D) ความเร็วลมเฉลี่ย 4.5 ม/วินาที Stack parameters: Height = 120 m = Diameter 1.20 m Exit velocity = 10.0 m/s = 315 °c Temp = |x(x,y,z,H)= Atmospheric conditions : Pressure = 95.0 kPa Temp = 25 °C 2лoo_u CO e te 67

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Complete the text using the correct form of the verb in brackets. (learn) was inspired 2) Maria is an advocate for promoting cultural exchange. She enjoys 1) about diverse traditions and is determined to make a positive impact. Last summer, she (volunteer) at an international festival, an event dedicated to celebrating global cultures. She was eager 3) (meet) people from different backgrounds and also hoped to be part of the dance performances, a chance for her to showcase her love for dance. During the festival, Maria's main role was 4) prepo joy in 5) (assist) the performers. She found V.tube (ensure) (witness) (help) them prepare the stage. Her goal was 6) a seamless and enjoyable event for all attendees. Maria was excited 7) ad. the audience's reactions and applause. After the festival, Maria was motivated 8) events. She aspires 9) dreams of 10) (continue) her involvement in cultural (organize) her own cultural festival one day. She also (foster) understanding of diverse global cultures.

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7 An important issue for a retailer is to decide when to reorder stock from a supplier. A common policy used to make the decision is of a type called s, S: The retailer orders at the end of a period if the on-hand stock is less than s, and orders enough to bring the stock up to S. The appropriate values of s and S depend on different cost parameters, such as inventory holding costs and the profit per item sold, as well as the distribution of the demand during a period. Consequently, it is important for the retailer to collect data relating to the parameters of the demand distribution. Suppose that the following data give the numbers of a certain type of item sold in each of 30 weeks. 14, 8, 12, 9, 5, 22, 15, 12, 16, 7, 10, 9, 15, 15, 12, 9, 11, 16, 8, 7, 15, 13, 9, 5, 18, 14, 10, 13, 7, 11

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Operator A B C D E FG 49.1 57.4 44.2 61 53.1 42.1 63.1 Determination 48.5 59.2 43.6 60 53.6 40.1 61.6 49.5 57.8 43.7 59.8 54.1 41 62.4 49 58.5 45.1 61.2 53.9 64.4 SD S²(n-1) Σn, -k i=1

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OFFERING ROBES m or "PHA PA means clothes forest Money tree During the feast called "PHA PA", money is given to restore the temple buildings but also to get funds to build new buildings. Such tree is called money tree The "PHA PA ceremony can happen at any time in the year. On the contrary "THOT KATHIN" ceremony only happens once a year and just after the end of the rain retreat. The name "PHA PA" can be translated to "clothes forest. A long time ago, monks only wear clothes made from old rags of dead people. So faithful people sometimes placed clothes on the tree branches in the forest. That is the origin of the "PHA PA ceremony. Directions: Answer these questions about Thot Khathin and Thot Pha Pa. 1. What is Kathin? 2. How long are the robes of Buddhist monks cut ? 3. Who would make Kathin robes in the olden times ? 4. When is a period of four weeks? 5. What is the key thing presented to monks in Thot Khathin and Thot Pha Pa? 6. When is Thot Khathin held? 7. When is Thot Pha Pa held? 8. What are presented to monks in the temples on Thot Khathin ceremony? 9. What is the Pha Pa money used for ? 10. What is junju' called in English? 11. What is th' called in English ? 12. What is the origin of the Pha Pa ceremony? 13. Why is it called Thot Pha Pa? 14. Can you tell about the difference between Thot PhaPa' and 'Thot Khathin'?