15. No one but her parents ______ it.
A. know B. knows C. is knowing D. are knowing
14. The Olympic Games _______ held every _______ years.
A. is…four B. are…four C. is…five D. are…five
13. Apples of this kind _______.
A. tastes good B. tastes well C. taste good D. taste well
12. The rich ______ not always happy.
A. are B. is C. has D. have
11. Ten dollars ______a big sum for a small child , and they will go a long way .
A. are B. being C. have D. is
10. I, who ______ your teacher, will try my best to help you with your lessons.
A. be B. am C. are D. is
9. Mary as well as her sisters ______ Chinese in China.
A. are studying B. have studied C. studies D. study
8. A large number of students of this school _______ fond of playing football.
A. are B. was C. is D. be
7. The air in big cities ______ very dirty by factories.
A. are often made B. is often made C. have often made D. has often made
6. The United States of America ______ one of the most developed countries in the world.
A. is B. are C. was D. were
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