private cars are bringing us convenience, they may also cause more traffic accidents and pollution.A——青夏教育精英家教网—

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科目： 来源：不详 题型：单选题

________ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.

A．While

B．As

C．If

D．Since

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科目： 来源：不详 题型：单选题

．piano is her main focus，she's also great at guitar．

A．Since

B．Once

C．Unless

D．While

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科目： 来源：不详 题型：单选题

I earn only 50 dollars a week, she earns 80 dollars.

A．when

B．while

C．as

D．since

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科目： 来源：不详 题型：单选题

Bring the plants into a warm room _____ they will soon open.

A．or

B．and

C．but

D．for

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科目： 来源：不详 题型：单选题

My parents don’t mind what job I do __ .I am happy.

A．even through

B．as soon as

C．as long as

D．as though

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科目： 来源：不详 题型：单选题

Mr. White in Los Angeles for years, but presently he has already adapted to living in Miami．

A．lived

B．had lived

C．has lived

D．was living

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科目： 来源：不详 题型：单选题

_______ we start thinking and believing we can do it, anything is possible.

A．Since

B．While

C．Until

D．Once

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科目： 来源：不详 题型：单选题

--- 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; when

B．before; since

C．when; before

D．since; before

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科目： 来源：不详 题型：单选题

Schools in the east tend to be better equipped, ____ those in the west are relatively poor.

A．As

B．While

C．When

D．But

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科目： 来源：不详 题型：单选题

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．unless

B．if

C．although

D．until

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