1. He knows where the boy was hiding but he didn't let
A. up B. off C. on D. in
2. He promised to deliver the stuff today and has let us again.
A. up B. on C. off D. down
3. It seems that the rain is letting
A. up B. on C. off D. in
4. The traffic was held by fog.
A. up B. over C. back D. out
5. Because of the heavy rain, today the meeting will be held until next week.
A. up B. back C. out D. over
1 C
2 D
3 A
4 A
5 D