the English club at school is the best way to improve our English.
Mrs. White doesn’t know her friend _______ to Beijing. If she _______ here, she will meet him at the station.
Chinese is one of ______ subjects in our school.
I was watching TV ______ my mother was writing an e-mail to her friend.
We must study hard so that we can get a good job when we ________.
David worked _______ a waiter in a restaurant in his part-time.