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科目： 來源：不詳 題型：單選題

________ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
A．WhileB．AsC．IfD．Since

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科目： 來源：不詳 題型：單選題

．piano is her main focus，she's also great at guitar．
A．SinceB．OnceC．UnlessD．While

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科目： 來源：不詳 題型：單選題

I earn only 50 dollars a week,       she earns 80 dollars.
A．whenB．whileC．asD．since

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科目： 來源：不詳 題型：單選題

Bring the plants into a warm room _____ they will soon open.
A．orB．andC．butD．for

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科目： 來源：不詳 題型：單選題

My parents don’t mind what job I do __ .I am happy.
A．even throughB．as soon asC．as long asD．as though

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科目： 來源：不詳 題型：單選題

Mr. White       in Los Angeles for years, but presently he has already adapted to living in Miami．
A．livedB．had livedC．has livedD．was living

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科目： 來源：不詳 題型：單選題

_______ we start thinking and believing we can do it, anything is possible.
A．SinceB．WhileC．UntilD．Once

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科目： 來源：不詳 題型：單選題

--- It’s a long time ______ I saw you last.
-----Yes, and what a pity it is now that it will be a long time _____ we see each other again.
A．since; whenB．before; sinceC．when; beforeD．since; before

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科目： 來源：不詳 題型：單選題

Schools in the east tend to be better equipped, ____ those in the west are relatively poor.
A．AsB．WhileC．WhenD．But

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科目： 來源：不詳 題型：單選題

In America．a friend's inviting you to a restaurant doesn't mean that he or she will pay for the meal     you are told in advance．
A．unlessB．ifC．althoughD．until

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