问题

Jack wasn’t saying anything，but the teacher smiled at him ________he had done something very clever．

A:as if
B:in case
C:while
D:though

正确答案是：

同类题型

Being young means having all kinds of possibilities, so you should challenge your limits and go ______ your boundaries

_____ scores of times , but he still couldn’t understand it ．[ ]

I have many friends ,______ some are businessmen

It is ______ that we can’t finish it on time.

Alice, you got an A in this science exam.—__________________.You know I am not good at it.