—She was late for the party.—That’s she had forgotten the exact time.A. whyB. howC. becaus

问题补充：

—She was late for the party.

—That’s she had forgotten the exact time.

A. why

B. how

C. because

D. whether

答案：

A. why

B. how

(答案→)C. because

D. whether

解析：考查表语从句：句意：--她聚会迟到了。--这是因为她忘了确切的时间。That is because…那就是因为…，because引导的是表语从句，that is why…那就是…的原因， how怎样，whether是否，不符合句意，选C。