_____ have you been to Beijing? — Twice. [ ]

Do John and Betty have a child？ —Yes. They _______ for twenty years.

If (如果) he isn’t at school. Please call me _______ 453-7868. [ ]

Do you like the hosts (主持人)in the Happy Camp?-Yes, I like them____Hejiong.

One of her eyes is hurt, but her _____ eye is OK.