按照建筑跨度可以将工业建筑分为（）。

A.生产厂房

B.单跨厂房

C.多跨厂房

D.纵横跨厂房

E.库存厂房

根据要求改写句子，每空一词。

小题1:They have been here since ten years ago.（对划线部分提问）

                                                   have they been here?

小题2:Mike used to get his mother angry.（改为一般疑问句）

                   Mike____             to get his mother angry?

小题3:I've never been to Beijing and Jack has never been there, either.（合并为一句）

              I             Jack has ever been to Beijing.

小题4:What do you do with your problems?（改为同义句）

How do you____                                your problems?

小题5:Have you finished your homework?（作否定回答）

                  ,I                   .