Mary is being punished（惩罚） by the headmaster. That was she broke the school rules.A. whyB.

问题补充：

Mary is being punished（惩罚） by the headmaster. That was she broke the school rules.

A. why

B. because of

C. the reason why

D. because

答案：

A. why

B. because of

C. the reason why

(答案→)D. because

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