本题选择什么15.He works as a teacher now,but he________ on a farm for three years.15.He works as a teacher now,but he________ on a farm for three years.A.worked B.has worked C.had worked D.works 但是我觉得应该选择B
问题描述：
本题选择什么15.He works as a teacher now,but he________ on a farm for three years.
15.He works as a teacher now,but he________ on a farm for three years.
A.worked B.has worked
C.had worked D.works
但是我觉得应该选择B
答
我也觉得是c
因为他现在是老师，那么以前的事用要用过去式。
后面有个For 那么就用完成时态。
综上所述：用过去完成时。C
答
选C
答
He works as a teacher now,but he (once worked) on a farm for three years.
这里加上一个once会更顺一些
答案：
A.worked
一定是说过去
他现在是老师,但以前曾经在农场工作过三年.
不能选择完成时态.