It ( ) three hours since we ( ) here.We ( ) here three hours ( ).

问题描述:

It ( ) three hours since we ( ) here.We ( ) here three hours ( ).

It ( has been ) three hours since we ( arrived ) here.
We (arrived ) here three hours (ago ).He has been a Party member for 10 years.同义句It()10 years ()he joined the Party.has beensince