【題目】My parents would have come to see you if it had been possible, but they __________ so busy.

A. were B. had been

C. have been D. would be

【答案】A

【解析】考查時(shí)態(tài)。此句考查的時(shí)態(tài)和虛擬語氣聯(lián)系在了一起。前半句句意:如果那時(shí)可能的話，我的父母會(huì)來看你的。根據(jù)虛擬語氣結(jié)構(gòu)可知指的時(shí)間為過去，因此后面用一般過去時(shí)態(tài)。

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