1.I've been teaching in this school since 1994
2.He has watched the movie for 4 hours
3.How long have you live in Beijing/
4.I have played tennis for a year.
1.Ben has been collectin...
1.I've been teaching in this school since 1994
2.He has watched the movie for 4 hours
3.How long have you live in Beijing/
4.I have played tennis for a year.
1.Ben has been collectin...
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