1.bad children (don't) make parents happy.
2.Bad news (don't) make people happy
3.Was it (an) easy work to do ?
4.Jack couldn't help us/He didn't give us (much) money.
5.Did Tom give you (many) books?
6. (Her eyes are) blue.
7. (Her hair is).
8. There is (hair/ a hair - оба варианта могут быть, если единственный волос на куртке, то а hair, если вообще на куртке волосы, то hair) on your jacket.
9. The money (is) in the desk,but you must not take (it).
10.You can't see (many) people there.