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

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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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