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单选题
146.Ifto look after luggage for someone else, think twice.
A
A. asked
B
B.to ask
C
C. asking
D
D.havingasked
答案解析
正确答案：A
解析：
146.【翻译】如果有人要求为他照看行李，要三思【精析】A分析句子结构可知，逗号后为省略第二人称主语you的祈使句，且you与ask之间是逻辑上的动宾关 系，所以空处应用过去分词，表被动：另外，也可将逗号前看作If引导的条件状语从句，其完整形式为If you are asked to look after luggage for someone else,这里省略了和主句相同的主语you和be动词are故选A
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