_______ his return from America, he got down to his research.A．WhileB．InC．AsD．On_刷题宝

题干

_______ his return from America, he got down to his research.

A．While

B．In

C．As

D．On

上一题下一题 0.64难度单项选择更新时间:2013-11-01 02:27:54

答案(点此获取答案解析）

小学学科试题库

初中学科试题库

高中学科试题库