You can only be sure ofyou have at present; you cannot be sure of somethingyou might get in the future.

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问题 You can only be sure of______you have at present; you cannot be sure of something______you might get in the future.

选项 A、that; what
B、what; /
C、which; that
D、/; that

答案B

解析 what引导宾语从句，并在从句中作宾语；that引导定语从句，并在从句中作宾语，可以省略。

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小学英语

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