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题型：单选题题类：模拟题难易度：普通

—Does your mother often surf the Internet ?
—Yes, ___________ she doesn't buy any thing on line.

A、but B、or C、and D、so

举一反三

—Will you come______have a drink with me?
—I'd love to, _______I'm too busy these days.

—Do you like math?

—Yes, it's interesting, _____difficult.

It's not always safe to pay over the Internet you should be careful.

The left-behind kids(留守儿童) can't see their parents the parents come back home from work.

Nancy didn't go to school yesterday she had a fever.

I'm all wet in the rain. This is _____ I forgot to bring an umbrella with me this afternoon.

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