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
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
D
D由前面的提示“蛋糕很甜”可知是“你一定是在里面放了很多糖”,故选D。must have done表示对过去情况的肯定的推测,“过去一定做某事。”