1.we have already bought the tickets for A-Mei's concert
2,I just have arrived at the airport
3 They haven't swept the classroom yet
4.she hasn't listened to teh CD yet
5 Has the cat almost caught the mouse?
6 Has he just left his house?
1.we have already bought the tickets for A-Mei's concert
2,I just have arrived at the airport
3 They haven't swept the classroom yet
4.she hasn't listened to teh CD yet
5 Has the cat almost caught the mouse?
6 Has he just left his house?
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