问题

When asked to explain ________ he does to make his students so fascinated with his lessons, the teacher paused and thought deeply.

A:what it is that
B:that what it is
C:what is it that
D:that what is that

正确答案是：

同类题型

_________ he took plane, he was frightened to cry

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You may___________he will come here to give us a hand.

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een stood up in defense ofthe 16-year-old boy, saying that he was not the one .