17)Kim has been cleaning the house since 8 o'clock.She has cleaned 4 rooms
Bob has been examinating patients since 10 o'clock.He has examined 3 patients
John has been delivering parcels since 7 o'clock.He has delivered 30 parcels
Helen has been drawing pictures since 10.He has drown 4 pictures.
18)2.How long
3.Since
4.so far
5.for
6.ever
7.recently
8.already
9.always
10.already
11.for
12.just
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