He asked whether he (have) ______to do the whole experiment again if he failed in a single test.

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问题 He asked whether he (have) ______to do the whole experiment again if he failed in a single test.

选项

答案would have

解析 本题考查过去将来时。根据时态呼应原则,asked为一般过去式,其后的宾语从句要用过去时态;又因为whether引导的宾语从句本身又是一个主从复合句,从句为if引导的条件状语从句,主句用将来时态,所以此处空格应该用动词的过去将来式。
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