题目内容

—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

D。对连词的考查。前者问MP5的优势是什么,答者说“妈妈,他们更小而且更轻,以至于他们可以轻松地被懈怠。”后句是前句的目的,so that表示目的,“以至于”。unless除非,if如果,until直到。所以答案选D.

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