Whenever you enter the reading room, you can find all the students _____ at their desks, with their attention _____ on the books, except Tom.
In the police station, I saw the man from ______room the thief had stolen the TV set.
Jack London, ___________ life had once been very hard, was successful later.
Martin Van Buren was the eighth president of the United States and the first ______native language was not English but Dutch.
We are going to spend the Spring Festival in Guangzhou, ______ my parents and some relatives.
The foreigner was talking to the children in the park ______ he was familiar with them.