You can only be sure of_________ you have at present; you cannot be sure of some

题干

You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get in the future.

A．that; what

B．which; that

C．/; that

D．what; /

上一题下一题 0.4难度单项选择更新时间:2012-08-22 08:17:54

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