题目内容：

    Young children often “read” picture books. They’re attracted by the colorful scenery and the realistic characters that contribute to fascinating plots.

Unfortunately, some children can’t use these resources, even if they do know how to read. Take three-year old Elodie Bateson, for example. Elodie was born with under-developed eyes and has retinal detachments（视网膜脱落），making her visually impaired.

It is because of people like Elodie that Tom Yeh, head of the Tactile Picture Books Project, has started printing 3D books, so they can feel the illustrations in picture books.

The first book Tom Yeh printed was Goodnight Moon, a popular children’s book about a rabbit going to sleep and wishing good night to his surroundings. In the 3D version of this book， children can feel each thing that the rabbit says good night to, whether it is a cow jumping over the moon, a balloon, or a dollhouse.

Generally, when children grow older, they read by using Braille, a language that was invented by Louis Braille in 1824. It uses different patterns of raised dots representing different letters. Readers can then feel the dots and mentally translate the patterns they feel into words. The only problem is that many blind children do not start learning Braille until they are about six years old.

Another reason why 3D printed books are such a valuable resource is that children don’t have to know how to read to understand them. However, without these, visually impaired kids are losing six developmental years vital to their growth since they can ’t take advantage of picture books.

When 3D picture books are printed, plastic is layered（分层放置）repeatedly over a single shape: the shape of the illustration. These raised pictures created through layered plastic serve as substitutes for the Braille letters that little children have no knowledge of.

1.What does the underlined word “impaired” in paragraph 2 mean？

A.Unmatched. B.Disappeared.

C.Defeated. D.Damaged.

2.What can we know about Braille from Paragraph 5？

A.The blind at any age can read by using Braille.

B.Most people can translate Braille into words.

C.Blind kids begin learning Braille at about six years old.

D.Braille uses similar patterns of raised dots to stand for different letters.

3.We can know that the illustrations in 3D books are raised ______ .

A.dots B.pictures

C.letters D.plastic

4.What is the aim of the Tactile Picture Books Project？

A.To teach the blind children Braille.

B.To encourage kids to read books.

C.To cure visually impaired children.

D.To help the blind children read picture books.