48. 1 where
2 where
3 why
4 why
5 why
6 when
7 why
8 when
9 where
10 where
49. 1 Where did he go on business?
2 When did it happen?
3 Why did they come here?
4 Why is he busy?
5 When is Tom's birthday?
6 When does she always finish her work?
7 When did they sell a lot of goods?
8 When did he buy a new house?
9 Why did we eat the cheese?
10 When does he usually begin his work?
50
1 how much
2 how
3 how
4 how
5 how
6 how many
7 how much
8 how many
9 how much
10 how many