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题型：单选题题类：常考题难易度：普通

The bus driver always says to us ,“Don't get off________ the bus stops.”

A、when B、while C、until D、if

举一反三

—Do you have the same hobby with your brother?
—No. I like collecting stamps _______ he likes reading.

You'd better look up the new word in a dictionary _____ you don't know it .

They don't have a baseball, _________ they have a ping—pong ball.

The old woman can't read _______ write.

Remember to turn off the lights you leave the room.

I like English _______ English is very important.

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