16．The necklace is worth more than five hundred dollars．Polly stole it．

15．He is the most careful boy．I know him．

14．The student studies very hard．Her father is a worker．

13．The plane was late．It was going to Tibet．

12．The play was very interesting．We saw it the night before．

11．The nurse is very kind．She looks after my little brother．

10．We talked about the things and persons 　　　　we saw then．

9．The man　　　　 you helped is my neighbour．

8．What is the name of the boy　　　　 brother is a doctor？

7．This is the best film 　　　　has been shown this year．