Last night Mr Crook didn’t come back at the usual time ______, he met some friends and Stayed out until midnight

afety issues, ____ willseriously affect the growth of teenagers and even the nation’s future.

Few pleasures can equal _____ of a cooldrink on a hot day.

He said yes _____ he was asked if he could possibly serve as a teacher in the remote area for two years.[ ]

May I watch TV for another 15 minutes, Mum?—Oh, dear, if you _____.