16. The performance ______ nearly three hours, but few people left the theatre early.
A. covered B. reached C. played

D. lasted
17. After studying in a medical college for five years, Jane ______ her job as a doctor in

the countryside.
A. set out B. took over C. took up

D. set up
18. If a person has not had enough sleep, his actions will give him _______ during the day.
A. away B. up C. in

D. back
19. Jack is late again. It is _________ of him to keep others waiting.
A. normal B. ordinary C. common

D. typical
20. It is not socially for parents to leave children unattended at that age.
A. accessible B. adorable C. adaptable D. acceptable

参考答案
16-20. DCADD