句型转换。

1. David was in the barber’s when the UFO arrived. （对划线部分提问）

____________________ David when the UFO arrived?

2. We were listening to the teacher carefully when she came in. （对划线部分提问）

___________________ you _____________ when she came in?

3. Lily followed her father to see her mother in hospital. （同义句）

  Lily _____________________ her father to see her mother in hospital.

4. Tom had a traffic accident yesterday. （同义句）

  A traffic accident____________________________ Tom yesterday.

5. She was so tired; it’s difficult for her to arrive on time. （同义句）

She was _____________ tired _______________arrive on time.