The reason he was late for class was he stayed up late last night.A. why; thatB. why; be

问题补充：

The reason he was late for class was he stayed up late last night.

A. why; that

B. why; because

C. that; that

D. that; because

答案：

(答案→)A. why; that

B. why; because

C. that; that

D. that; because

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