It was on the last day ______ a press conference was held by some committee members.
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.
The computer doesn’t work well and it requires _____ but the manager requires me _____ to use it.