Mrs. Black doesn’t know if her American friend_____ to Heilongjiang. If he_____ here, she will meet him at the airport.[ ]

It’s too hot．Would you mind the door?—,please do it now．

Are these books ________? —No, they are not mine. They belong to ________.

Did you go to bed early last night?— No. I watched a movie, so I didn’t go to bed until 11 o’clock.

Xu Qian is a funny girl. She loves to __________ jokes.