the students in this school is about four thousand,      of them are boys．

A．A number of, three fifthB．The number of, three fifths
C．A number of, three fifthsD．The number of, three fifth

B

解析試題分析：此題考查分?jǐn)?shù)的表示方法。分?jǐn)?shù)在英語(yǔ)中通常是借助于基數(shù)詞和序數(shù)詞來共同表達(dá)的。其中基數(shù)詞表示分子，序數(shù)詞表示分母。分子超過1，分母要加s.分?jǐn)?shù)修飾名詞時(shí)，若該名詞是不可數(shù)名詞只能用單數(shù)；若是可數(shù)名詞，用單數(shù)或復(fù)數(shù)均可。但是，若它們?cè)诰渥又凶髦髡Z(yǔ)，則謂語(yǔ)動(dòng)詞是用單數(shù)還是復(fù)數(shù)取決于名詞，即與分?jǐn)?shù)所修飾的名詞保持一致。根據(jù)語(yǔ)境可知此句的含義是這所學(xué)校的學(xué)生大約有四百人，其中五分之三的是男生。表示…的數(shù)量要用名詞短語(yǔ)the number of，五分之三要用three fifths, 故選B。
考點(diǎn)：分?jǐn)?shù)的基本用法。
點(diǎn)評(píng)：對(duì)于分?jǐn)?shù)的考點(diǎn)有這么幾個(gè)。第一是分子和分母的表示，到底是用基數(shù)詞還是用序數(shù)詞。第二，分子超過1時(shí)，分母的變化；第三分?jǐn)?shù)做主語(yǔ)時(shí)謂語(yǔ)動(dòng)詞的取決，到底是用單數(shù)還是復(fù)數(shù)。

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科目：初中英語(yǔ) 來源：江蘇期末題 題型：閱讀理解

閱讀理解。
     Mr. Ma, a famous mental doctor (心理醫(yī)生) from  Beijing once said at an important meeting, "Now
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have to study very hard. Others have trouble getting on well with  people  around  them like their parents
and classmates. Parents and teachers should care more about this problem."
     Then Mr. Ma gave   some examples.  A  middle  school   studen t from  Xi'an   was doing badly in his
lessons. He thought his teachers and friends often laughed at him, and he became so nervous and worried
that one night he left his home without telling  his  parents. Another student, a 14-year-old schoolgirl from
Shanghai, was very afraid of exams. While she was reading the exam paper, she couldn't think of anything
to write.
     A recent report from a newspaper says  about  18%  of the young students in Shanghai have mental
problems. They often feel worried and very unhappy. Unluckily many of them won't go and ask for help.
Some think they will look stupid if they go to see a doctor. Others won't talk about their secrets.
     At the end of the meeting, Mr. Ma gave some good ideas to young people:
Talk to your parents or teacher often.
Join in group activities.
Try to get on well with the people around you.
Go to see a doctor if you often feel unhappy.
1. The students who often become worried or have trouble getting on with others may have _______.
A. no parents
B. no secrets
C. poor families
D. mental problems
2. Some of those with mental problems won't ask for help because _______.
A. they don't want to tell their secrets to others
B. their parents are too busy to look after them
C. doctors can't help them with the problems
D. they can do with the problems themselves
3. The underlined word "stupid" in this passage means _______.
A. pretty
B. happy
C. not clever
D. not friendly
4. According to the last part, which of the followings is a good idea?
A. It's important for children to live with their parents.
B. It's helpful for people to see doctors every day.
C. It's useful for students to keep quiet in class.
D. It's necessary for young people to have group activities.

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