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[析] 数词、名词、形容词等词用连字符连接成的形容词中，名词都不要加s，如： I have to write a two?thousand?word report.而且由连字符组成的形容词只能放于名词前，不能放于名词后，作后置定语，或用在be动词后作表语。
4.There are ___ students in our school.
A. four hundred twenty
B. four hundred and twenty?
C. four hundreds twenty
D. four hundreds and twenty
[答案] B.
5- How many days are there in a year?
?- There are ___ .
A. three hundreds and sixty?five
B. three hundreds sixty?five
C. three hundred and sixty?five
D. three hundred sixty five
[答案] C.
6.We have learned about ___ English words.
A. nine hundreds
B. nine hundred
C. nine hundred of
D. nine hundreds of
[答案] B.
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