题目内容
(2013海南三亚)—Susan,what are the advantages of MP5 players?
—Mom,they are smaller and lighter________they can be carried very easily.
A. unless
B. if
C. until
D. so that
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题目内容
(2013海南三亚)—Susan,what are the advantages of MP5 players?
—Mom,they are smaller and lighter________they can be carried very easily.
A. unless
B. if
C. until
D. so that