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  3. He is an Aexperienced businessman: he has Bengaging in foreign Ctrade for a few Dyears.

He is an Aexperienced businessman: he has Bengaging in foreign Ctrade for a few Dyears.

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问题 He is an Aexperienced businessman: he has Bengaging in foreign Ctrade for a few Dyears.
选项 A、 
B、 
C、 
D、 
答案B
解析 应改为been engaged。be engaged in意为“从事……”，由句中的时间状语for a few years可知，后面的分句应用完成时，故用been engaged。
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