9. I haven’t been to __________ theater before.
A. a open air
B. open air
C. the open air
D. an open air
10. Most people think that __________ is an important part of life.
A. the good job
B. good job
C. good jobs
D. a good job
11. I don’t believe that a third of __________ should be paid in tax.
A. the person’s income
B. a person’s income
C. person’s income
D. person income
12. The number of loyal customers __________ on the rise thanks to the company’s effective advertising
campaign.
A. is
B. are
C. am
D. be
13. I try to go jogging at least four times __________.
A. the week
B. of the week
C. a week
D. of a week
14. People __________ always willing to switch to a better product.
A. is
B. Are
C. Be
D. Am
15. Too much rubbish is being dumped in __________.
A. sea
B. The sea
C. A sea
D. Some sea