(   ) 3. [2015 • 滨州]—Look at the sign!It says "No Smoking". 

-Oh,sorry. I       it.

   A. don't see   B. haven't seen

   C. wasn't seen   D. didn't see

(   ) 2. [2015 • 广州]Miss Brown,we        cleaning our classroom. Can we go home now?

   A. finish   B. finishing

   C. are finished   D. have finished

(   ) 1. [2015 • 自贡]—What were you doing when I phoned you yesterday evening? 

— I was doing homework while my parents       dinner,grandma.

   A. cooked   B. cook

   C. were cooking

4. The mountain is so steep that we can't reach the top. (用too...to…改写句子)

The mountain is           for us              the top.

3. Having a good rest is impossible for me. (用it改写句子)

             impossible for me               a good rest.

2. He has worked in this company since he moved to this city. (对画线部分提问) 

                     he       in this company?

1.I think there is something wrong with my digital camera.(改为否定句)

I       think there is       wrong with my digital camera.

5. 我们必须学会不受不良习惯的影响。

We must learn to                      bad habits.

4. 每天睡眠八小时很重要。

It's very important to get                     every day.

3. 你应该只是偶尔吃点快餐。

You should only have fast food