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题目内容
（沈阳医学院继续教育学院-英语3）
By the end of this year Mr. Smith _____ in our company for exactly three years.（2.0分）
2.0 分
A、
is working
B、
has worked
C、
will work
D、
will have worked
2.0 分
A、
is working
B、
has worked
C、
will work
D、
will have worked
参考答案
