单句语法填空
1．Since I have_finished (finish) my homework, I can go to the cinema with you this evening.
2．I have_been_meeting (meet) this young man many times on my way home lately, who is most likely to be our new neighbour.
3．I have_known (know) Li Wei for ten years. Now he is one of my important business partners.
4．We have_been_working (work) on this project for four hours. Let's have a rest.
5．Now that she is retired, Lucy has_been_considering (consider) going travelling abroad, but she hasn't decided yet.
