It’s very important _____ us to make a plan before a new term. —Yes. You must try to make it carefully. [ ]

They are just college graduates and don’t realize _____ to start and run a company.

Most scientists seem to agree that ________ certain limit should be set on ______sale of cars to ease air pollution.

A: _____is Mary?B: I think she is at home．

Linda_____ come to meet me at the station, but I’m not sure.