11.I was making model planes when my mother came back.（对画线部分提问）

_______ _______ _______ _______ when your mother came back?

2.I think classical music is boring.（改为否定句）

I _______ _______ classical music is boring.

3.My mother was doing the dishes at that time.（同义句转换）

My mother was _______ the _______ at that time.

4.He read a story-book last night.（改为过去进行时）

He _______ _______ a story-book at eight o’clock last night.

5.He wasn’t old enough to go to school. (同义句转换)

He was _______ young_______ go to school.

用所给动词的过去时或过去进行时填空：

Last Sunday morning my mother was doing the cooking and the 

washing. My brother Jack ______ (get) things ready for his picnic.