--There is somebody knocking at the door. Who________ it be?--I’m not sure. It ________ be a postman.
How do you say 15,858?
I think Kunming is a good place________.
——________? ——Father’s Day is coming. I’d like to buy a present for my father.
There is something wrong _________ my computer.
——I am going on a trip to Xi’an next week. ——_________.