---Guesswhat!Ihaveownthefirstprizeinthespeakingcompeti...

问题详情：

 ---Guess what! I have own the first prize in the speaking competition.

  ---Congratulations! You ______ put a lot of work into it.

  A. should              B. must           C. should have     D. must have

【回答】

D

知识点：虚拟语气与情态动词

题型：选择题