Question

This cake is very sweet. You __________ a lot of sugar in it.

       A．should put         B．could have put   C．might put D．must have put

Answer 1

D 

解析：本题考查情态动词的用法。表示对过去所发生事情的较为肯定的推测，应使用“must＋have＋过去分词”的形式。