题目内容
It is surprising that Jack, who is only 39 years old, _______ in the field of engineering for 20 years when he entered the company last month.
| A.worked | B.had worked | C.has worked | D.working |
B
解析
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题目内容
It is surprising that Jack, who is only 39 years old, _______ in the field of engineering for 20 years when he entered the company last month.
| A.worked | B.had worked | C.has worked | D.working |
B
解析