【題目】These problems are too hard to work out, ______?

A. are they B. aren’t they

C. is it D. isn’t it

【答案】A

【解析】

試題分析:句意:這些問題太難而不能算出。反意疑問句,遵循前面是肯定句,后面是否定句,前面是否定句,后面是肯定的一般疑問句,動詞使用前后一致。這里These problems是復(fù)數(shù)形式,用they來代替,且用肯定的一般疑問句。根據(jù)題意。故選A。

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