Have you _____been to Beijing—No, but I want to go there next year.

Alice told me you called yesterday.— Yes, I had a problem with Jane, ___________I thoughtyou could help me with, but you were not in.

Do you often talk with your friends on thetelephone or mobile phone — I like using QQ

This is Mary. ________is my friend.

Tell John not to leave the house________he makes sure that all the lights are turned off.[ ]