1.　　　 Gao shan is thiner than his brother.

45.　 Liu Tao usually reads newspaper. (改为过去时)

44.　 Nancy drew some pictures yesterday. (改为否定句)

43.　 He has a brother. (改为一般疑问句)

42.　 I like playing football. (改成第三人称单数he)

41.　 Mary can fly. (变为一般疑问句，并作否定回答)

40.　 They are our women doctors. (变为单数)

39.　 She is an English girl. (变为复数)

38.　 Liu Tao needs some pencils. (改为否定句)

37.　 It is hot in summer in New York. (对画线部分提问)