Students ________ remain in their seats until all the papers have been collected.

Theplane is due to take off at 7∶50 from the airport–________ we fail to arrive there in time

The picture was taken a long time ago, but it looks as if it yesterday.

He didn’t feel a bit nervous when _____—No He’d had a lot of time _____ for it after all

resident Barack Obama on Wednesday paid honor to health care workers who have treated Ebola patients in West Africa, calling them “heroes”_________ to be applauded rather than discouraged.