Last month, doctors used a 3-D printer to rebuild the face of a person ____ had a bad accident.
China lies ____ the east of Asia and ____ the north ofAustralia.
There is an old bridge ____ the river.
Yao Ming is a popular basketball player ____ the Chinesepeople.
----How old are you? ----I’m fifteen. I was born ________ 1990.
I study for a test _________ working with a group.