1.we/already/buy/the tickets/for A-Mei's concert/.
答案:
We have already bought the tickets for A-Mei's concert.
2.I/just/arrive/the airport/.
答案:
I have just arrived the airport.
3.they/not sweep/the classroom /yet/.
答案:
They haven't swept the classroom yet.
4.she/not listen to/the CD/yet/.
答案:She hasn't listened to the CD yet.
5.the cat/almost/catch/the mouse/?
答案:
Has the cat almost caught the mouse?
6.he/just/leave/his house/?
答案:
Has he just left his house?