题干

Mr Brown was too busy ______ our papers _______ this question.

A:to mark, to answer

B:to mark, answering  

C:marking, answering

D:marking, to answer

上一题 下一题 0.0难度 选择题 更新时间:2018-12-17 03:11:33

答案(点此获取答案解析)

D