答案：D

题目分析：考查交际用语，A. Cheer up振作起来，用于表示鼓舞别人B. Good luck祝你好运C. Best wishes最好的祝愿，一般用于写信中D. Congratulations祝贺，表示庆祝别人，由前面的句子My daughter came first in the English speech contest.所以选D

点评：交际用语是高考常考内容，做此类题型首先要理解上下文题意，然后根据上下文之间的逻辑关系及英文习惯悬着正确答语

即学即练：---- I wonder if I could borrow your bike for a second time.

----         .You nearly damaged it last time.

A.Why not?          B.I don’t think so.   C.By no means.     D.By all means.

选C