А)
1) The boy has eaten cereals.
2) We haven’t drunk our coffee yet.
3) He has gone to school.
4) Has your mother bought sugar?
5) The children have swum in the sea.
6) My friend has ridden his new bike in the park.
7) Mary has run very fast in the competition.
8) The kids have sat on the grass.
B)
1)Has the kid slept in a tent?
2)My father hasn’t drunk coffee.
3)My mother has bought fruit and vegetables
4) Has your father sold his car?
5)Tom hasn’t ridden the bike
6) I haven’t drunk coke for lunch.
7) Sally has read a magazine