What do you usually do _____ your computer? —I usually chat _____ QQ friends online. [ ]

David_______ all night in order to watch the football match between France and Italy.

In our city, ________ college students want to work as a teacher in holidays.

I used to go camping a lot, so it isn’t the first time I ____in a tent.

There is _______ interesting book on the teacher’s desk.–Oh, ______ book is Wei Fang’s.