387.Hi,Mark.How was the musical evening?
Excellent!Alex and Andy performed _______ and they won the first prize.
A.skillfully
B.commonly
C.willingly
D.nervosly
388.If a person has not had enough sleep,his actions will give him ______ during the day.
A.away
B.up
C.in
D.back
387.答案是A;根据下文they won the first prize得知，他们表演得很娴熟。
388.答案是A;give away 赠送，泄露，表露；give up 放弃；give in 屈服，让步；give back 归还，返还。句意:如果一个人没有足够的睡眠的花，那么在白天他的行为就会表露出来。
