---It is a good way to study English with a group. ---Yes. I find it ________ to improve English.

单选题

---It is a good way to study English with a group. ---Yes. I find it ________ to improve English.

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单选题

It is not good to ___with your mouth open.

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多选题

If someone is in the United States for good, it means he is there ______ .

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单选题

You have been walking a long way, so _____ is a good rest.

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单选题

Though the ideal cure for noise is to stop it at its source,this may in many（ ）be impossible.The next remedy is to absorb it on its way to the ear.Domestic noises may by controlled by forethought and courtesy and industrial noises by good planning and technical improvement.

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