Question

Ann

為什麼是B
不是應該是過去式嗎
17題

he stree
g
6.0
t
re in
ng
(B) must have preserved
(C) should be preserved
(D) ought to have preserved
The river used to be very polluted, but now the garbage in it
(A) had been cleaned
(B) has been cleaned
C) was cleaned
D) has cleaned
18. John
Abeing late again.
(A) was scolded
(C) has been scolded
out.
by his boss for over ten minutes now. Apparently, she is not hap
(B) has scolded
(D) is being scolded
19. Since then, World Hello Day-November 21st of every year-
obse

有人使用網球場,所以我們不能玩。
15. (A) 後半句有“we couldn't play"表過去時間,所以前半句的時間也
ca
76
16. (C)
17. (B)
b
① 為了使馬路看起來賞心悅目,所以在拓寬時,這些樹大部分都
留下來。
② 「樹」要被保留,所以用被動。
。
這條河以前污染很嚴重,但現在裡面的垃圾已經被清理乾淨了。
②從 now 得知,動詞應用現在式,而且主詞是垃圾「被清理掉」
選(B)。
活用 圖解英文法

Answer 1

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Terry

used to是曾經的意思（代表現在不再），所以是過去被污染了
但是第二句的but是轉折，時間是now（現在），所以就是用現在式，意思是但是現在已經被清理乾淨了