----- Nội dung dịch tự động từ ảnh -----
14. A dripping faucet
A. can waste B. is wasted
500 liters of water a month.
C. waste
D. are wasting
15. He sighed
A. sadly
16. Please
when he heard the news.
B. sad
C. sadden
D. sadness
the lights. It's very dark.
B. go on
C. get on
started to tell the story.
A. turn on
D. put on
17. The man sat down on the chair
A. so
B. and
C. or
D. because
by motorbike to save energy.
C. however
_with what you're doing. Don't look at them!
C. away
18. You should travel by bike
A. therefore
B. instead of
D. because
19. Please go
A. on
20. The new appliance does not only work
B. out
D. down
but also saves energy.