题目内容：

句型转换。(每空1分，共10分)

根据所给提示，完成句型转换。每空一词，含缩略词。

1.This dress cost her 100 dollars. (改为否定句)

This dress ________  ________ her 100 dollars.

2.His father will be back next week. (对划线部分提问)

________  _______ his father be back ?

3.Students shouldn’t wear earrings at school. (改为被动语态)

Earrings shouldn't  _______  _______ by students at school.

4.Mike likes taking a bus to work. He likes taking an underground to work better. (合并为一句)

Mike ________ taking an underground _________ taking a bus to work.

5.她奶奶习惯于晚饭后散步。

Her grandmother ________ used to ________  a walk after supper.