It做形式主语练习
1. In fact
is a hard job for the police to keep order in an important football match.
A. this B. that C. there D. it
2. Is
necessary to take off our shoes when we enter the lab?
A. everyone B. this C. her D. it
3. ________ will take you a lot of time to find him in the crowd.
A. It B. I C. We D. They
4. It is no use _________ there, the situation is hopeless now.
A. to go B. to be going C. going D. having gone
5. ___________ is known to all that
Shenzhou VI Launched Successfully.
A. As ...