练习:
1. How many babies are born with low birth weight in the
developed countries every year according to WHO?
A 20，000，000.
B 18，000，000.
C 2，000，000.
D 38，000，000.
2. A pill of multivitamins may contain all of the following
substances EXCEPT
A all vitamins in the B group.
B vitamins C and E.
C much iron and folate.
D antiviral substances.
3. Which of the following is NOT one of the effects of
multivitamins mentioned in the passage?
A To reduce the rate of babies born too early.
B To reduce the risk of low birth weight.
C To reduce fetal deaths in pregnant women infected with
HIV.
D To increase the number of lymphocytes in mothers’ blood.
4. What a role do lymphocytes play in the human body?
A To reduce the rate of dying while still a fetus.
B To raise the body’s immunity against infection.
C To help prevent the development of heart disease.
D To help prevent the development of diabetes.
5. How many percent of babies were born with low birth
weight to women who were not infected with the AIDS virus and
took the multivitamins according to a new study?
A Less than8%.
B About 9.5%.
C 1.5%.
D 17.5%.
答案与题解：
1.C 第一段最后两句说到，WHO估计每年有2000万出生婴儿体重过
低，其中十个中有九个生于发展中国家，可见发达国家只占十分之一，故
应是200万。
2.D 文章第二段第二、三句已经说明，选项A、B、C均是多种维生
素片所含的物质，只有D项没有提及，而且也不可能。
3.A 关于多种维生素制剂的作用，B项在第四段第二句提到，C项在
第三段倒数第三句提到， D项在第三段最后两句提到，只有A项在第四段
倒数第二句中提到它时却说维生素对它不起什么作用。
4.B 第三段最后一句是文章中唯一一句说明淋巴细胞在身体中的作
用的句子，故是正确答案，其他A、C、D三项都与淋巴细胞无关。
5.A 第四段第一句和第二句已经将本题答案说得很清楚，其中的
just under eight percent (只不足8%)正是A项的less than 8%。