题目内容：

Many people have low iron in their blood. But pregnant women need extra iron for their own health and their baby's health. Iron is important to the development of a baby's brain and central nervous system.

In poor countries, however, providing all pregnant women with iron supplements can be a financial issue. Some experts say giving supplements to babies after they are born is enough.

Someone who disagrees is Paul Christian, a nutritionist at the Johns Hopkins School of Public Health in Maryland. She and other scientists have been doing research in Nepal. She says their latest findings should settle any question about the value of making sure every pregnant woman receives iron supplements.

Iron is a micronutrient. Micronutrients are important substances that are found in small amounts in foods.

The researchers first completed a study among poor women in Nepal ten years ago. During pregnancy some of the women received supplements containing iron and folic acid.

Professor Christian says that study showed the supplements could improve child survival.

Now the children are older. The researchers returned to Nepal and tested their neurological(神经的) development. They found improved intellectual and fine motor abilities among those whose mothers had received iron and folic acid during pregnancy and for three months after.

The findings appear in the Journal of the American Medical Association.

Another new study, published in the journal Pediatrics, looks at levels of vitamin D in babies. It says newborns with the lowest levels were twice as likely to develop respiratory infections(呼吸道感染)as those with normal levels of vitamin D.

Vitamin D helps build strong bones and strengthens the body's defenses against disease. The vitamin is commonly added to cow's milk and also found in supplements. But vitamin D is called the sunshine vitamin. The body naturally produces it from sunlight.

Carlos Camargo from Harvard Medical School in Massachusetts and other researchers did the study. It followed more than nine hundred children in New Zealand until they were five years old.

1.The passage is intended to tell us that_________.

A. iron is as important as Vitamin D to people’s health

B. pregnant women need much more iron and Vitamin D

C. in poor countries babies are lacking iron and Vitamin D

D. iron and Vitamin D may lead to smarter, healthier children

2.When expecting a baby, a woman doesn’t necessarily receive some extra_________.

A. iron    B. folic acid    C. vitamin D    D. supplements

3.It can be learnt from the passage that__________.

A. providing all pregnant women with extra iron may be difficult for all countries

B. plenty of micronutrients can be found in foods that you eat in your daily life

C. it’s more possible for babies lacking vitamin D to suffer from respiratory infections

D. all the vitamins that you need to keep healthy can be received from the sunlight

4.The underlined words in Paragraph 5 refer to_________.

A. a micronutrient    B. a food    C. a metal    D. a medicine