A hot balloon blew up in Egypt. There ________ something wrong with the quality of it.

Amay have been Bmust be

Cneed have been Dmight be

 

A

【解析】A考察 情態(tài)動詞。句義:在埃及的一個熱氣球爆咋了,可能是熱氣球的質(zhì)量出了問題。根據(jù)blew可知,此處表示的是過去情況的推測,使用情態(tài)動詞+have done的形式。故A正確。

 

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