Qian Xuesen devoted all his life to ________________ China’s Space Program.
#49535
A
develop
B
developing
C
developed
D
develops
推荐题目
The life we were used to ________ greatly since 2002
#50668
A
change
B
changing
C
have changed
D
has changed
— a volunteer is great.—I think so. Some of us want volunteers for the London Olympics.
#51206
A
Being; being
B
To be; being
C
Being; to be
D
To be; to be