根据句意填词

Jack is playing games ________ David. They are my friends.

根据句意填词

　　----________ your father working here now?

　　----No, he ________.

根据句意填词

Look! Sam and Tom ________ swimming in the river now.

介词填空

Does Simon want to find a new pen pal ________ China?

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Please write and tell me ________ yourself.

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They play football and watch TV ________ weekends.

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Our classes are over ________ 5:00 in the afternoon.

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I often listen to music ________ supper.

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　　---When is your birthday?

　　---It's ________ December 15.

介词填空

My sister can sing this song ________ Japanese.