24. Many bikes are _ _ _ _  front of our school.

A. at             B. on             C. for               D. in

23. He can ride a horse and he can sing very _ _ _ _ .

A. well          B. good           C. nice             D. fine

22. Have they got _ _ _ _ _ melons?

A. a             B. some            C. any             D./

21. How many people _ _ _ _ _there in your family ?

A. is            B. are             C. have            D. has