(2010·黑龍江省雞西市，29，1)( )Usually, we don’t know how important something is ______ we lose it.

A. or B. until C. as soon as

(2010·北京市，28，1)-Would you like to go to the concert with me? -I’d love to, ______ I’m afraid I have no time.

A. so B. or C. and D. but

(2010·廣西省定西市，15，1)( )She had a stomachache she ate something bad.

A. so B. because C. or D. although

(2010廣西南寧28. 1)He has a lot of money ,________he isn’t happy.

A.and B.but C.so D.or

(2010·天津市，41，1)We won’t start the meeting ______our teacher arrives.

A.though B.until C.while D.or

(2010·青海省，寧夏，28，1)( ) Bob is young, _______ he knows a lot.

A. because B. so C. but D. unless

答案：BDBBBC

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