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Frank is working late again. This is the third time this week he has had to stud

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Frank is working late again. This is the third time this week he has had to stud

Frank is working late again.

This is the third time this week he has had to study late, ________?

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A.isn't heB.isn't itC.isn't thisD.hasn't he

试题答案

答案:B

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