The Youth League Committee is looking for volunteers for the promotion of rubbish-sorting. Would you like to join in—________. Everyone should do his bit.

I don’t believe in him. You know, what he said doesn’t _____ what he did.[ ]

We can use QQ to talk with each other on the Internet.—Really But can you tell me _______it.

Theprofessor in the letter is from Shanghai.

It was in this house ________ the villagers held the secret meeting.