—Guess what？ I have got A for my term paper.
—Great!You _______ read widely and put a lot of work into it.
A．must haveB．should
C．mustD．should have
A
試題分析:上文意思,猜猜看，我在學期報告中得了一個A。下文意思，真棒！你一定是閱讀廣泛并且你付出了很多勞動。 must have done表示對過去發(fā)生的事情或狀態(tài)進行推測，語氣比較肯定，通常只用于肯定句.Should應該，must必須should have done表示過去本應該做的事卻沒做。故選A.
點評：情態(tài)動詞之間的區(qū)別主要是語氣不同，但提前首先要理解句子要表達的含義,然后做出準確判斷. must have done表示對過去發(fā)生的事情或狀態(tài)進行推測，語氣比較肯定，通常只用于肯定句.Should應該，must必須should have done表示過去本應該做的事卻沒做。
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