—Guess what! I have got A for my term paper.
—Great! You ______ read widely and put a lot of work into it.
A．mustB．shouldC．must haveD．should have
C
既然已經(jīng)通過考試，自然是以前閱讀廣泛﹑用心學(xué)習(xí)了，故在C﹑D中進(jìn)一步選擇，D項表示本應(yīng)當(dāng)，因不附題意而被舍去。
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