1¡¢In the early __________(fifty), researchers found that people scored higher on intelligence tests if they spoke more than one language.

2¡¢The captain said she was the __________(twelve) tutor, who had come to look after his children since their mother died.

3¡¢In the summer holiday following my __________(eighteen) birthday, I took driving lessons.

4 ¡¢Two        (five) of the land in this district is covered with trees and grass.

5¡¢Not only I but also Jane and Mary __________(be) tired of having one examination after another now

6¡¢It is either he or you who __________(be) in charge of the project and supposed to finish it punctually,

7¡¢I have finished a large part of the novel written by Dickens, the rest of which__________(be) very difficult.

8¡¢All the children are interested in the piano lessons. Not only John and Tom but also their sister, Mary, __________(be).

9¡¢Fast food__________(be) full of fat and salt;by eating more fast food people will get more salt and fat than they need in their diet.

10¡¢Either you or I__________(be) going to be in charge of this matter now.

11¡¢No one in the department but Tom and I__________( know) that the director is going to resign.

12¡¢The understanding between two friends __________(mean) both of them have similar ideas and trust each other.

13¡¢Many a student __________(be) selected to take part in the English competition, and more than one teacher __________(have) coached them on speaking and writing.

14¡¢A survey of health researchers __________(show) that four hours of exercise every week __________(be) good for our health.

15¡¢Nobody but three students __________(be) in the laboratory at that time.