问题

The country has already sent up threeunmanned spacecraft, the most recent ________ at the end of last March.

A:injuring
B:having been launched
C:being launched
D:to be launched

正确答案是：

同类题型

Professor Li is the person to ____________ you should write.

“Wechat”(微信) really makes a great ________ to people’s life. It’s easy for us to keep in touch with others.

Why not _________ by boat for change

Peter didn’t want to go to the cinema but they begged so hard that he _____ and went with them. [ ]

__________ entered the office when herealized that he had forgotten his report