1.She asked when he would come back.
2.She is doing her homework,isn't she?
3.He left early so that he could catch the bus.
4.He has gone to Shanghai two years ago.
1.She asked when he would come back.
2.She is doing her homework,isn't she?
3.He left early so that he could catch the bus.
4.He has gone to Shanghai two years ago.