______ that he picked up his uncle at the airport?— It was at 6:00 in the afternoon ______ he got off work[ ]

Students ___________ remain in their seats until allthe papers have been collected

We should do what we can our environment.

He accidentally _____ he had quarreled with his wife and that he hadn’t been home for a couple of weeks. [ ]

With temperature ______ so rapidly, we could not go with the experiment.