用when或者while填空

1．________ Tom was eating supper, it began to rain outside.

2．Don't use your cell phone ________ you are driving a car.

3．What were you doing ________ Mr. Zhou came in?

4．Jim is good at math ________ Mary is good at English.

5．We were watching TV ________ the electricity was off.

6．________ Peter was sleeping, a thief broke into his house.

7．It snowed ________ we arrived in Tokyo.

8．She left her hometown ________ she was five.

9．I was studying in the library ________ the UFO landed.

—What were you doing when the UFO arrived?— I         with my dog on the street.

A. walked           B. was walking      C. is walking       D. have walked

---What were you doing when the UFO ______?

   ---I ______ a milk shake.

   A. reached, made   B. reached, was making   C. arrived, made   D. arrived, was making