题干


—Has Mr. Black decided not to take part in the party?
—Yes. But the reason______he refused the invitation is not clear.

A:what

B:for which

C:with what

D:which

上一题 下一题 0.0难度 选择题 更新时间:2018-09-28 07:11:09

答案(点此获取答案解析)

B