用since、for或ago填空.1.How long is it () you wrote to your sister?.

问题描述:

用since、for或ago填空.1.How long is it () you wrote to your sister?.
用since、for或ago填空.
1.How long is it () you wrote to your sister?
2.How long () did you write to your sister?
3.Jim has been working in Asia () he left England.

1 since
2 ago
3 since
请及时采纳,多谢!