With Halloween approaching, there exists a real concern among parents and teachers __________ trick or treating will become a seriously anti-social activity.

________________ many times, he still repeated the same mistake.

May I speak to Mr. Smith— I am afraid he’s not ___________. He is at a meeting now.

We ________ contact with each other for years. And last week we ________ contact again.

What’s your favourite sport —I like ___________.