7.-What did you say to your sister?I saw her crying in the room.
-It        my fault.I just said hello to her when I met her,nothing else.( 。
A.must have beenB.can't have been
C.oughtn't to beD.should have been

分析 --你對(duì)你妹妹說什么了?我看見她在房間里哭.
--不可能是我的過錯(cuò).我僅僅是和她打招呼了,沒其它的.

解答 答案是B.本題考查"情態(tài)動(dòng)詞+have done"的結(jié)構(gòu).對(duì)過去的或已經(jīng)發(fā)生的事件的說明往往用"情態(tài)動(dòng)詞+have done"的結(jié)構(gòu),由問句中的did和saw可知事件已經(jīng)發(fā)生,所以用"情態(tài)動(dòng)詞+have done"的結(jié)構(gòu),排除C.must have done表示推測(cè),表示"肯定已經(jīng)…";can't have done表示"不可能已經(jīng)…";should have done是虛擬語氣,表示"本應(yīng)做但事實(shí)上卻沒有做";根據(jù)句意"我僅僅是和她打招呼了,沒其它的."推斷妹妹哭"不可能"是我的過錯(cuò),故答案選擇B.

點(diǎn)評(píng) 要在正確理解情態(tài)動(dòng)詞的基本含義的基礎(chǔ)上,整體理解語境中的情感態(tài)度,做出合理的判斷.

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