21. The teenagers had ____ good time in summer camp last week. A. a B. an C. the 22. There are three ____ and two ____ in the group. A. Chinese; American B. Chineses; American C. Chinese; Americans 23. He has two kites, one is big, ____ is small. A. the other B. another C. other 24. Our new school was built on July ____ last year. A. the sixth B. six C. the six 25. — How nice the fish tastes! Could you tell me who taught you to cook it? — To be honest, I learned it ____ watching TV. A. for B. by C. in 26. Running Man is one of ____ TV shows in China. A. most popular B. the most popular C. more popular 27. ____ a volunteer is so great because we can help those who are in trouble. A. Being B. Be C. Been 28. “Help ____ to some meat, Mary, ” my aunt said to me. A. yourself B. yourselves C. themselves 29. He ____ in Yongzhou since seven years ago. A. works B. worked C. has worked 30. He ____ an empty bottle and put it into the rubbish bag. A. picked up B. threw away C. looked for 31.My parents ________allow me to play outside _______I finish m homework yesterday.