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
B　[第一個空填what，引導(dǎo)賓語從句；第二個空的定語從句引導(dǎo)詞作賓語，可省略。]
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