题目内容：

    When Ariyah Georges was born 15 weeks early, she weighed only one pound, 12 ounces. Her mother, Jovan, knew how important breastfeeding was, especially for a premature (早产的) baby like Ariyah, so she began pumping milk to feed her through a tube. But two days later, Jovan felt dizzy and feverish — 104 Fahrenheit degrees, in fact. She had a blood disease and was close to full shock.

She was separated from others for nearly two weeks at the regional Northern Virginia hospital where she'd delivered. During that time, she could still pump breast milk, but Ariyah couldn't consume it because of the risk of infection. Without it, the newborn was particularly easily affected by diseases. There are many cases like this, which creates the need for the milk donation.

Enter donor milk breast milk purchased by hospitals for mothers who aren't able to produce enough milk on their own, due to health complications, stresses, or other factors. The milk comes from milk banks, organizations that collect and screen breast milk from those women willing to donate. Usually processed in intensive-care units, the milk is only available by prescription.

In recent years, both milk banks and the use of donated human milk have risen swiftly in the United States. In 2011, 22 percent of NICUs used donor breast milk; four years later, that number doubled to nearly 40 percent, and went even higher for the most intensive NICUs — as much as 75 percent. There are 23 milk banks in the United States recognized by the Human Milk Banking Association of North America, or HMBANA, double the number that existed five years ago.

But as the demand for donor milk rises, banks must find more charitable donors — a task made more complicated by informal networks of milk sharing that happens online. And many of the most vulnerable infants are still not being reached.

1.Jovan couldn't feed her baby Ariyah on her breast milk because_______.

A.Ariyah was a premature baby B.Jovan couldn't produce enough milk

C.Jovan was separated from others D.Jovan was in poor health.

2.By telling the story of Ariyah and her mother, the writer wants to______.

A.tell us what to do if mothers cannot produce enough milk.

B.remind us of the importance of breastfeeding the newborn.

C.introduce the topic of an increasing need for donated human milk.

D.warn us against the risk of the newborn being affected by diseases.

3.How is the writer's idea mainly developed in Paragraph 4?

A.By following time order. B.By listing statistics.

C.By giving examples. D.By making predictions.

4.What problem are milk banks now faced with?

A.It's difficult to find enough charitable donors.

B.networks of milk looking for donors online are informal.

C.The milk purchased from milk banks cannot reach infants' home.

D.The number of women willing to donate breast milk are decreasing.