问题

30When he was only thirty years old, he had already experienced______most people only experience when they are much older

A:what
B:which
C:who
D:When

正确答案是：

同类题型

They are not _______ pants. _______ are under the bed.

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ou come across a new word , you should learn to guess the meaning of the word according to the ________ clues , which may be in the sentence that comes before the word.