题目内容
9．Sam's father travels to Tokyo，the capital of Japan，________business once a month．（ ）| A． | from | B． | about | C． | to | D． | on |
分析 萨姆的父亲每月一次去东京--日本的首都出差．
解答 答案：D．
结合语境可以推断这句话表达的意思是"萨姆的父亲每月一次去东京--日本的首都出差．"，所以设空处的介词短语表达的意思是"出差"，应该用on business，故选D
点评 英语介词的一个特点是一词多义，并且介词间语义交叉现象很多，习惯用法也很多，有时很难从词义上区分开来．故学习中要注意不断总结，熟记一些介词和动词的固定搭配用法及习惯用法，是完成此类问题的捷径．
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