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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