—Any information about your son? —No. If

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问题选择题

—Any information about your son?

—No. If only I ________ those tough words to him.[ ]

A. didn't say

B. hadn't said

C. shouldn't have said

D. couldn't have said

答案

答案：B

问答题

眼睛看到从平面镜反射来的光线如图所示，在图中确定入射光线．

选择题

— I rang you yesterday afternoon. A man answered, but I didn't recognize the voice.

— Oh, it ____ my uncle. He was in my room then. [ ]

A. should have been

B. should be

C. must have been

D. must be