6、1949 is the year 　　　　　　　　　　 　the People’s Republic of China was founded.

5、Do you know the student 　　　　　　　　　　 　was praised at the meeting?

4、The film 　　　　　　　　 　we saw the day before yesterday is very interesting.

3、This is the boy 　　　　　　　　　　 　father died three years ago.

2、The hospital 　　　　　　　　　 　was built five years ago has been modernized.

1、This is the professor 　　　　　　　　　　 　taught me chemistry in 1980 .

50.　　 Who is the man whom you said hello just now?

49.　　 This is the knife with that the doctor did the operation.

48.　　 Those that want to go put up your hands.

47.　　 It is one of the best pictures which have been sold.