问题
选择题
| — How long _____ at this job? — Since 1990. |
| A. were you employed B. have you been employed C. had you been employed D. will you be employed |
答案
答案：B
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| — How long _____ at this job? — Since 1990. |
| A. were you employed B. have you been employed C. had you been employed D. will you be employed |
答案：B