There was nothing they could do______.
By the end of this year, another new museum_____in this small city.
Don’t blame your brother. He had____reasons for not supporting you.
David, you _____play with the valuable bottle; you_______ break it.
Zhangqiang is said ______ the experiment in the lab, but I can’t find him there.
I’ll go to meet you if I ________ free then.