用括号内所给动词的适当形式填空。

31. Look! Li Ping (　　　　　　 ) (play) in the park.

30. Did they sell out this kind of computer? (改为被动语态)

　　 (　　　 ) this kind of computer (　　　 ) out?

29. “Don't open your books!” the teacher said to us. (改为间接引语)

　　 The teacher told us (　　　 )(　　　 )(　　　 )(　　　 ) books.

28. The Young Pioneers are making @.@model planes@.@. (改为疑问句)

　　 (　　　　 )(　　　　 ) the Young Pioneers making?

27. Those birds are very beautiful. (改为感叹句)

　　 (　　　　 ) beautiful those birds are!

26. You will meet your friends at the railway station, (　　　　 ) you? (完成反意疑问句)

25. The children cleaned the library last Monday. (改为否定句)

　　 The children (　　　 ) (　　　 ) the library last Monday.

24. Does he often skate in winter? (作肯定回答)

　　 (　　 　), he (　　　 ).

　　 按照括号内的要求完成下列各句(每个空白只填一个词，缩写词算一个词)。

23. There is a pencil on the desk. (改为一般疑问句)

　　 (　　　 ) (　　　 ) a pencil on the desk?

22. take place

　　　 A. man, woman or child　　　　　　 B. a lot of

　　　 C. the first month of the year　　　　 D. happen　　　　　　　　 (　　 )