The WHO has given some advice on to prevent us being infected(感染)with H7N9.
— How old is his father? — He is thirty ________.
Many people believe Christ came back to life on __________.
The __________ will visit our new school, and they are from America.
Cindy's father is a worker. He works in a __________.
If you want to send a letter, you can go to the ____.