When you are travelling ______, you often need to stay in a hotel.A、if on busine

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问题 When you are travelling ______, you often need to stay in a hotel.

选项 A、if on business or for pleasure
B、whether on business or for pleasure
C、whether business or pleasure
D、on business or pleasure

答案 B

解析 本题考查疑问词引导的状语短语。选择中,whether on business or for pleasure相当于状语从句whether you travel on business or for pleasure,意思是:无论你因公出差旅行,还是为娱乐旅行。whether... or…搭配使用,所以A项if..短语不可用,B是正确答案。
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