They are _____ in Shenzhen now, I think they must enjoy themselves.[ ]

I don’t know when he ____. But if he ____, I’ll ring you up.

Jack, is this your jacket?–No, it _______ be my jacket. My jacket is black but this one is blue.

Yang Shan Zhou becomes well-known in China for planting so many trees for people.

What’s in the newspaper?—There __________ some news, two pictures and some stories in it.