I know you have eaten all sorts of junk food your mother and I probably you have.A. shou

问题补充：

I know you have eaten all sorts of junk food your mother and I probably you have.

A. shouldn’t let

B. can’t let

C. couldn’t have let

D. shouldn’t have let

答案：

A. shouldn’t let

B. can’t let

C. couldn’t have let

(答案→)D. shouldn’t have let

解析：

试题分析:考查情态动词用法。根据语境可知此句是对过去事情的推测，排除A、B选项，而couldn’t have done意思是“不可能做过某事”，而shouldn’t have done意思是“本不应该做某事（但是做了）”，所以D选项正确。句意：我知道你已经吃完了各种我和你妈妈本不该让你吃的垃圾食品。