1．Carol Walker didn't turn up last time，did she？
No．She _______．We had changed our plan．（　　）
A．shouldn't  have  comeB．needn't  have  to  come
C．didn't  need  to  comeD．needn't  have  come

分析 --卡羅爾沃克昨晚沒有出現(xiàn)，對嗎？
--是的．她不必來．我們已經(jīng)改變了我們的計劃．

解答 答案是C．本題考查虛擬語氣和真實語氣的辨析．A 表示"本不應(yīng)該來而實際上來了"；B項形式錯誤；C項是真實語氣，表示"過去沒有必要來，事實上也沒有來"；D 項表示虛擬"本不必做但是實際上做了"；根據(jù)語境，她沒有來，因為計劃改變，是真實語氣，故懸案C．

點評 在掌握虛擬語氣的規(guī)則的基礎(chǔ)上，判斷題干屬于什么類型的虛擬，然后根據(jù)語境，選用恰當?shù)膭釉~形式表達虛擬．

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