【題目】What? Is it the first time that this ?

A. happened B. has happened

C. had happened D. happens

【答案】B

【解析】試題分析：本題的固定句式為：It/This is/was the序數(shù)詞 time that從句，句意：是某人第幾次做某事的時(shí)候了。如果前面是is，后面就使用現(xiàn)在完成時(shí)；如果前面是was，后面就是過去完成時(shí)。本句中使用了is說明后面使用現(xiàn)在完成時(shí)。句義：什么？這是第一次發(fā)生這樣的事情？根據(jù)句義說明B正確。

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