(      )22． Students in the U．S．usually do badly on exams in _________ ．

你的英国朋友David打算到北京来玩，希望你抽出时间带他游览北京。请简单介绍一下

你为他准备好的行程。

45． Tina sat under the tree half an hour ago．（用now改写）

Tina ________,________under the tree now．

43． The teacher didn't say anything in the class．（改为同义句）

The teacher________ , ________in the class．

44． There were many pictures on the wall．（改为一般疑问句）

________,________many pictures on the wall?

41． Tom said he had a fun day off．（对划线部分提问）

________.________Tom________   ?

42。You can-t be here on time ,l think．（合并为一句） ．

I________,________ you________,________ here on time．

40.__________

38.________

39.__________

36._________