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题型：单选题题类：常考题难易度：普通

Mr. Green and Mr. King have taught English at Beijing Sunshine Secondary School ________ they came to China two years ago.

A、since B、as C、for D、until

举一反三

My brother knows little Japanese, ______ he can't understand the instructions of his camera.

I have a computer __________ I don't often use it.

_______ it snowed hard, _______ I didn't go out.

Betty kept silent at first _______ soon she joined the other girls, chatting and laughing.

You can come and play with me _____ you're free.

The elephant is ___________ big ___________ go through the door.

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