题目内容

You can only be sure of __________ you have at present; you cannot be sure of something __________ you might get in the future.
A.that; whatB.what; /
C.which; thatD./; that
B。
第一空填what,用以引导宾语从句,用作介词of的宾语,其中的what在从句中用作动词have的宾语; 第二空填that,用以引导定语从句,修饰先行词something。
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