—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(xué)期報(bào)告中得了一個(gè)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(dòng)。 must have done表示對(duì)過(guò)去發(fā)生的事情或狀態(tài)進(jìn)行推測(cè)，語(yǔ)氣比較肯定，通常只用于肯定句.Should應(yīng)該，must必須should have done表示過(guò)去本應(yīng)該做的事卻沒做。故選A.
點(diǎn)評(píng)：情態(tài)動(dòng)詞之間的區(qū)別主要是語(yǔ)氣不同，但提前首先要理解句子要表達(dá)的含義,然后做出準(zhǔn)確判斷. must have done表示對(duì)過(guò)去發(fā)生的事情或狀態(tài)進(jìn)行推測(cè)，語(yǔ)氣比較肯定，通常只用于肯定句.Should應(yīng)該，must必須should have done表示過(guò)去本應(yīng)該做的事卻沒做。
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