Question

This cake is veny sweet．You ________ a lot of sugar in it．

[　　]

A．

should put

B．

could have put

C．

might put

D．

must have put

Answer 1

答案：D
解析：

must have done表示对过去发生的事或已经完成的动作肯定、推断，意为“想必，一定已经……”。只用于肯定句。根据题意，D项正确。