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;what B.what;/
C.which;that D./;that
B
解析:
what引导宾语从句,作介词of的宾语,what在宾语从句中作have的宾语。something后接定语从句,可以省略that。
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