四、任务型阅读
Fred's favourite subject is Physics. It helps him a lot in his daily life. Do you know how to put an egg into a small bottle? Look at the picture and help Fred complete(完成) the interesting experiment.
Question: How can we
put an egg into a small bottle
?
Materials(材料): a match(火柴), a bottle and a boiled(煮熟的) and peeled egg.
Steps: • Light the match.

• Put the match into the bottle.
• Shake the bottle to make it warm enough.
• Put the egg in the opening of the bottle and watch.
Result(结果): The egg falls into the bottle through the opening.
Principle(原理): The air pressure(气压) inside the bottle is lower than outside.
回答下面5个问题,每题答案不超过7个词。
1. What's Fred's favourite subject?
Physics.
2. What's the experiment about? Fill in the blank " _▲_ " to complete the question.
put an egg into a small bottle
3. Why does Fred shake the bottle?
To make it warm enough.
4. How many steps does it need to complete the experiment?
Four.
5. What makes the egg fall into the bottle?
Air pressure difference.