题目内容

It is our duty _________our hometown clean and beautiful. We must do something for it.
A. to keep           B. keeps               C. keeping
A
这里考查的是it is  + 名词 + to do sth.结构。故选A。
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网