20、- When did you ______ unhealthy diets?

　 - Around 2001.

A ． go on　　　　　B ． take up

C ． carry out　　　　D ． begin with

19、- Where does it ______?

　 - Here. Just here. Ouch!

A ． pain　　　　　 B ． hurt

C ． suffer　　　　　 D ． beat

18、 What do you students usually have _____ breakfast?

A ． at　　　　　　 B ． as

C ． for　　　　　　D ． with

17、- Why don't you turn to him for advice?

　 - ______.

A ． That's all right　　 B ． Nothing serious

C ． That's a good idea　　 D ． No problem

16、 Some books are to be tasted, others to be swallowed, and some few to be chewed and ______.

A ． accepted　　　　 B ． considered

C ． learned　　　　　D ． digested

15、 A healthy diet should include a variety of food, most of ______ should be rich in nutrients.

A ． them　　　　　 B ． it

C ． which　　　　　D ． what

14、 After a whole morning's sport's activities, we need to____ for the rest of the day.

A ． gain　　　　　 B ． refuel

C ． function　　　　 D ． examine

13、 It took me ______ energy to make the plan for the project.

A ． a large number of　　B ． a plenty of

C ． lots of　　　　　D ． a great deal

12、 To entertain our friendly visitors we'll prepare food _____ for king.

A ． good　　　　　 B ． healthy

C ． fit　　　　　　D ． tasty

11、 If she is completely well, she _____remain in hospital.

A ． had not better　　　 B ． ought not to

C ． has not to　　　　 D ． would not rather