英语四级单选题及解答
[color=#000][font=Simsun][size=13px] 第一组：[/size][/font][/color][color=#000][font=Simsun][size=13px] 1. The vacuum cleaner is a valuable labor-saving ______ action. A. device B. engine C. piece D. instrument[/size][/font][/color][color=#000][font=Simsun][size=13px] 2. The flight was postponed because of technical problems and was finally cancelled last week when a ______ was discovered. A. accident B. defect C. damage D. defeat[/size][/font][/color]
[font=Simsun][color=#000000][size=13px]【资料下载】[/size][/color][/font][url=http://down.tingroom.com/english/47240.html]英语四级单选题及解答[/url]
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