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:

前文说“蛋糕很甜”，下文的语境显然应该是“你一定是在里面放了很多糖”，故用“must+完成式”表示对过去情况的肯定推测。