15. The farmer had put down some rat
A. poisoning
B. poisoner
C. poisoned
16.
loss can be caused by noise pollution.
B. hearing
C. listening
A. sound
17. The government has come
A. up to
B. up with
come up with : đến với
18. If the air was clean, we
A. wouldn't
19. If he
A. will throw
20. If it rains, we
A. cancel
21. If I were a tree, I
B. won't
have to wear masks when going out.
C. would
D. will
trash around his garden, the garden would look very nice now.
B. would throw C. didn't throw
D. doesn't throw
the match.
B. will cancel
D. audio
a solution to the water problems of the city.
C. to with
D. on to
the
D. poison
C. cancelled
rain.
2
D. cancelling