Could we complete the task according to the schedule?—I doubt that．The problem remains _____ we can get financial aid from the government．

This house is one of ________ buildings in the town．We must take actions to protect it．

A governmentofficial was murdered last Friday and the police are collecting informationthat is________to the case.

you worked here since you graduated—No, I ________ at a factory in Beijing for six years.

When the news came the war broke out, he decided, to serve in the army