改错：They are going on holiday after a few days.

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改错：Are there any alive things on the moon?

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改错：Having a cell phone makes us to feel safer in cage of an emergency.

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改错：The teacher wanted to teach the students all what he knew in the last lesson.

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改错：Why didn't go to my birthday party last night?

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改错：As soon as he arrived in America, he stayed in touch with his friends in New York.

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改错：I have introduced to Mr Wang.

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改错：She has got married to Robert for a year.

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改错：How long do you think the meeting is lasted?

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改错：He said that the message should have passed on to him.

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