1. 他们正在等公共汽车。
( ) They are waiting the bus.
() They are waiting for the bus.
2. 那些飞机正从桥上空飞过。
( ) Those aeroplanes fly on the river.
() Those aeroplanes are flying over the bridge.
3. 孩子们正在做什么？
() What are the children doing?
( ) What are the children do?
4. 他们正在看那艘船。
( ) They are looking the ship.
() They are looking at the ship.
5. 玛丽和她妈妈正在厨房做饭。
() Mary is cooking in the kitchen with her mother.
( ) Mary is cooking in the kitchen and her mother.

语法特训 根据示例，写出相应的句子。
示例：Mrs. Black / cook a meal
What is Mrs. Black doing? She is cooking a meal.
1. Tom / read a book

2. the dog / eat bones

3. the girl / type a letter

4. the man / run after a bus

5. the children / do their homework