known to all, the newly learnt words will soonbe forgotten unless_____ used in everyday communication.

You were out when I went to your house thismorning.—Oh, I _______ for a friend from England at theairport.

Be quiet _____you will wake the whole house!

It was raining hard. Kate decided _____ at home.

It was so noisy in the dining room that only by shouting ____ to make himself heard.