In 2007,i was lucky enough to be the only one selected from our group to go abroad . i ___ (study)there for four years and finally returned to Nanjing .请问这里可以使用过去完成进行时吗?还可以用什么时态?望给以详细解答,谢谢!
问题描述：
In 2007,i was lucky enough to be the only one selected from our group to go abroad . i ___ (study)
there for four years and finally returned to Nanjing .
请问这里可以使用过去完成进行时吗?还可以用什么时态?望给以详细解答,谢谢!
答