问题
单项选择题
Mr. Jones（）in the company for twenty years by the end of next month
A.will work
B.will have worked
C.has worked
D.would work
答案
参考答案：A
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Mr. Jones（）in the company for twenty years by the end of next month
A.will work
B.will have worked
C.has worked
D.would work
参考答案：A