问题
选择题
The man is teaching in our school, but，believe it or not，he __ as a business man for 8 years.
A．worked
B．was working
C．had worked
D．has been working
答案
答案：A
现在在学校教学，因此做生意人8年是一个发生在过去的动作，用过去式
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W