Напишите предложения в Present Perfect Continuous 1)Alex (play) football for twenty minutes.
2)Anna ( not, talk) on the phone since afternoon.
3)We (learn) the poem for half an hour.
4)People (work) on this problem the beginning of the century.
5)Peter (not, watch) TV for an hour
6)How long you (do)these exercises?
7)We (live) here for nine years.
8) It (rain) all day?