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7. I felt surprised that anyone of his intelligence    such an easy test. 

A. might have failed      B.  could have failed

 C.  should have failed     D. must have failed

7.    C考查情態動詞。句意:我感到很驚訝,他這樣聰明的人竟然沒通過如此簡單的測試。由surprised看出本句表示驚訝。should表示驚訝,意為"居然,竟然",從而確定C項正確。【拓展延伸】一般說來,"情態動詞+ have done"應從兩方面考慮含義. 

(1)   "對過^情況的猜測(如musL have done"肯定做過了……")

(2)   與過去事實相反(如should have done"本該做而實際上未做") 但本題的A、B選項比較特別,試比較:

He might/could have passed, but he was too nervous.

他本可以/本能夠通過的,可是他當時太緊張了。

He might/could have passed, but I haven't seen him.

他可能已經通過了,但我還沒見到他呢。(言下之意,只是猜測而已)

題目來源:2015全品語法快練高中英語新課標 > 訓練25 情態動詞和虛擬語氣

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