Part 1:
1) are they (c)
2) play (c)
3) to make (b)
4) nor (c)
5) not to (c)
6) do they live (a)
7) used (a)
8) have (b)
9) if it will (b)
10) which (a)
Part 2
1) "tell" заменить на "say"
2) добавить "their" перед "classes"
3) добавить "it" после "likes"
4) "so" заменить на "neither"
5) "she would go to the hospital" заменить на "she is going to the hospital"
6) "can we" заменить на "if we can"
7) "is" заменить на "does"
8) "can't" заменить на "couldn't"
9) "a" перед "useful advice" заменить на "some"
10) "nothing" заменить на "anything"