问题

Would you please explain to me about the difference between the two phenomenon? –I’m sorry, but that’s just _____ I’m puzzled about.

A:why
B:what
C:which
D:where

正确答案是：

同类题型

The prisoner seemed to have been a bit.

8 He said that I would go abroad next month, ______?

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You_______ play with the knife. You______ hurt yourself.

know, I met my girlfriend’s parents for the first time only yesterday. — ________ I thought you’d met them before.