问题补充:
It is our duty our hometown clean and beautiful. We must do something for it.
A. to keep B. keepsC. keeping
答案:
解析:这里考查的是it is + 名词 + to do sth.结构。故选A。
时间:2021-03-28 10:20:54
It is our duty our hometown clean and beautiful. We must do something for it.
A. to keep B. keepsC. keeping
解析:这里考查的是it is + 名词 + to do sth.结构。故选A。