问题详情:
The country has already sent up three unmanned spacecrafts,the most recent ________at the end of last March.
A.has been launched B.having been launched
C.being launched D.to be launched
【回答】
B
知识点:非谓语动词
题型:选择题
问题详情:
The country has already sent up three unmanned spacecrafts,the most recent ________at the end of last March.
A.has been launched B.having been launched
C.being launched D.to be launched
【回答】
B
知识点:非谓语动词
题型:选择题