A
1) Where did you go?
2) How did you get there?
3) Who did you go with?
4) What did you see?
5) How long have you been there?
B
1) What did you do?
2) Who did you stay with?
3) When did you come back?
C
1)Where did...
2) What did you buy?
3) how much did you spend?
D
1) How many did you read/ how many have you read?
2) question does not make any sense, it is incomplete. i guess you can say something like... How long does it take to read one?