D．He had a language disability.

解析：选A　推理判断题。由倒数第二段的描述以及"That inspires me."可知，这个七岁男孩的变化极大鼓舞了Holmes。

6．What can we infer about Holmes from the last paragraph?

A．He showed great concern for kids.

B．He faced serious money problems.

C．He had an excellent sense of humor.

D．He built a shelter for homeless kids.

解析：选A　推理判断题。由最后一段中的"The way the world is today with guns and violence"和"it's a safe haven for the kids, to come to the barbershop and read books"可知，Holmes特别关爱孩子们。

7．What is the best title for the text?

A．Great minds inspire great deeds

B．A new way to make reading fun

C．An unusual library in Dub unique, Iowa

D．Barber gets kids reading with free haircuts

解析：选D　标题归纳题。通读全文可知，本文主要讲述了美国爱荷华州迪比克市的一名理发师为那些给他阅读故事的孩子们提供免费理发服务的故事，D项作标题能概括文章主旨。

Instead of reaching for the fake tan or heading for the sun, new research suggests the best way to obtain a healthy glow is to eat more fruit and vegetables.

"Most people think the best way to improve skin color is to get a suntan, but our research shows that eating lots of fruit and vegetables is actually more effective，" said Dr. Ian Stephen at the School of Psychology, University of Nottingham. The team of researchers found that people who eat more portions of fruit and vegetables per day have a more golden skin color, due to compounds called carotenoids (类胡萝卜素)．

Carotenoids are antioxidants (抗氧化剂) that help absorb damaging compounds produced by the stresses and strains of everyday living, especially when the body is fighting disease. They are also responsible for the red coloring in fruit and vegetables such as carrots and tomatoes, and are important for our immune and reproductive systems.

"We found that, given the choice between skin color caused by suntan and skin color caused by carotenoids, people preferred the carotenoid skin color，" said Dr. Stephen.

"The study findings are important as they suggest that evolution favours people who choose to form alliances with healthier individuals over unhealthy individuals，" Dr.Stephen explained.

Professor David Perrett said，"This is something we share with many other species. For example, the bright yellow beaks and feathers of many birds can be thought of a s signs showing how healthy a male bird is. Besides, females of these species prefer to mate with brighter, more colored males. But this is the first study in which this has been demonstrated in humans."