【C18】A．thoughB．except thatC．becauseD．unless

【C18】A．BecauseB．IfC．AlthoughD．Unless

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【C18】A．thoughB．whileC．beforeD．until

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【C18】A．anythingB．thatC．everythingD．nothing

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（) you work hard, you will certainly succeed.A. ThoughB. IfC. BecauseD. For

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Your cough will get worse______you give up smoking.A．so long asB．on condition thatC．unless

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【C4】A．Even thoughB．Now thatC．If onlyD．Provided that

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【C6】A．in thatB．so thatC．such thatD．except that

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