Chọn đáp án đúng: He knows where the boy was hiding but he didn't let ..

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11. He knows where the boy was hiding but he didn't let
A. up
B. off
C. on
12. He promised to deliver the stuff today and has let us
A. up
B. on
C. off
13. It seems that the rain is letting
B. on
A.up
14. The traffic was held_
17. Keep children
A. in with
A.up
C. back
15. Because of the heavy rain, today the meeting will be held
A. up
B. back
C. out
16. I would have been here sooner but the rain kept me
A. back
B. from
from the fire.
B. from
18. It is the most important
A. touch with
19. He promised to keep
A. in touch with
by fog.
20. I took
B. over
to keep_
C. off
B. up with
C. on
C. away
your neighbors.
C. in with
us while he was abroad.
again.
B. up with
C. in with
him at once. and we have been friends over since.
D. in
D. down
D. in
D. out
_until next week.
D. over
D. up with
D. back
D. away from
D. away from