B

1. ///
2. ///
3. Mr Grant didn't used to go camping, but he does now.
4. Mrs Grant used to go camping, but she doesn't now.
5. Mr Grant used to travel abroad, but he doesn't now.
6. Mrs Grant didn't used to travel abroad, but she does now.

C

1. him
2. her
3. me
4. it
5. them
6. it
7. them

D

1. you
2. I
3. you
4. I
5. her
6. We
7. She
8. They
9. they
10. I
11. them
12. us
13. I