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

【C18】A．BecauseB．IfC．AlthoughD．Unless

【C18】A．thoughB．whileC．beforeD．until

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

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

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

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