九年级英语第二十单元

九年级英语第二十单元,标签：初三下册英语教案,初中英语教案,http://www.67xuexi.com
B.It means that the air in a high place is as thin as that in a low place.
C.It means that the air vecomes thinner in a higher place.

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( )2.Why so people often get dizzy when they go up ;into high mountains?
A.Because they are too tired./
B.Because there is less oxygen in the air.
C.Because their lungs becomes smaller.
( )3.Mountain Indians can breathe thin air because______.
A.they have larger lungs than common people.
B.they need less oxygen than common people.
C.they are much stronger than common people
( )4.From the passage we know_____.
A.it is hard for all the people to breathe thin air.
B.it is hard for Indians to breathe thin air.
C.it is hard for those who live in lower places to breathe thin air.
( )5.The main idea of this passage is _______.
A.people get used to the air where they live
B.air is very important
C.the Indians who live in high mountains.
(CBACA)
　

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