Đáp án:
1. Why wasn't he helped?
2. How many games have been played by the team?
3. Where is English spoken?
4. Who are being kept in the kitchen?
5. How can this be opened safe?
6. What books are being read this year?
7. How was the lost man found by the police?
8. By whom are the children looked after for you?
9. How long has the doctor been waited for?
10. What time can their papers be handed in by the boys ?
11. By whom is this book lent?
12. How many marks are given to you by the teacher ?