1.don't his parents look after him well?
2.didn't Mary buy a new watch last month?
3.doesn't water coner two thirds of the earth?
4.willn't they finish the building of the earth?
5.willn't London people hold the 2012 Olymipic Games?
6.isn't John repairing the TV set?
7.aren't the students cleaning the classroom?
8.didn't he cut down the tree?
9.hasn't they already thrown away the rotten food?
10.hasn't she never drunk the wine?