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Refer to the table, answer questions 7-9. Table: Some properties of elements at 25C and 1 atm pressure Hardness or Appearance Electricity conductivity Element Melting Boling point (C) toughness point (C) Shiny, silvery liquid Mercury Yes -39 357 Colourless gas Hydrogen No -259 -253 Iron Shiny, silvery solid Hard and tough Yes 1,538 2,861 Sulphur Yellow solid Hard and brittle No 120 445 Sodium Shiny, silvery solid Soft and tough Yes 98 883 Silicon Shiny, silvery solid Hard and brittle Slightly 1,414 3,265 Boron Black Solid Hard and brittle No 2,030 3,900 Chlorine Yellowish green gas No - 102 -35 Bromine Orange red liquid No -7 59 Oxygen Colourless gas No -219 - 183 Magnesium Shiny, silvery solid Hard and tough Yes 650 1,090 lodine Shiny, dark purple Hard and brittle No 113.5 184.5 Solid 7. Which elements are metals and which are non-metals? 8. Is silicon a metal or non-metal or metallloid? Justify your reason. 9. What are the uses of metals, non-metals and metalloids in daily life? Give examples. 0. Blement A is a solid with shiny ธurfaces, good electricity and heat conductivity, the density Or 7.8 g/cm, boiling point of 1,090 C and melting point of 650 C. Is Element A a metal or non-metal? Justify your reasons. 67

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ตอบอะไรบ้างคะ จนปัญญามากค่ะ เรื่องpast simple & past perfect

Icould tell from the a. frightened, was happened c. frightening, would happen look on her face that something terrible b. frightened, had happened d. frightening, had been happened 1. The entire audience a. had risen, was falling C. was rising, had fallen in applause the minute the final curtain b. has risen, falls d. rose, fell 2. me for quite some time when, at last, I The tooth a. bothered, had resolved C. had been bothering, resolved 3. to see my dentist. b. was bothering, resolve d. has been bothering, have resolved 4. It was revealed at the trial that the accused man out on the night of the murder. a. won't have gone C. hasn't gone b. hadn't gone d. wouldn't have gone I'm realy sorry to have broken your crystal vase. It it into the room. 5. out of my hand as I a. was slipping, was bringing C. slipped, was bringing b. had slipped, brought d. would slip, brought When the police arrived, the diver on the ground. 6. already. the body out of the river and it a. has, pulled, lay C. was, pulling, had lain b. would, pull, were lying d. had, pulled, was lying I didn't notice as I a. have left, dripped C. left, was dripping 7. the car in the garage that fuel from underneath it. b. was leaving, will drip d. would leave, had dripped 8. Do you know how fast he a. drove C. had driven at the time of the accident? b. was driving d. will have driven 9. After the accident, the taxi driver a. accused, was going C. was accusing, has gone the bicyclist of not looking where he, b. had accused, would be going d. would accuse, has been going 10. Until the disaster, no one a. had thought, would sink C. was thinking, can sink that the huge oceanliner Titanic b. thought, sank d. has thought, will sink

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