68. D考查细节理解。由第四和第五两段可知，不同年龄阶段的吸烟者都存在皮肤老化的问题，即吸烟者年龄与研究的结果无关。故D项表述正确。

67. B考查细节理解。由第三段中的the total number of cigarettes(香烟)smoked per day and the total years a person has smoked were connected with the number of skin damage(损害)可知A、C两项表述正确；由第六段可知D项正确。文中没有提到皮肤的类型和状况与皮肤老化的联系。

66. D考查主旨要义。由前两段可知，科学家们一份新的研究表明，吸烟不仅可以使面部皮肤起皱纹，而且会使全身皮肤老化。下文具体阐述了吸烟与皮肤老化的联系。故D项为最佳答案。A、C项的表述太笼统，没有突出文章的中心；B项只是文章的细节。

70. The main purpose of the passage is to ______.

A. inform people about the result of the study

B. advise people to how to protect skin

C. warn people not to smoke again.

D. introduce a new way of avoid skin aging

69. From the passage smoking results in skin aging mainly because_____.

A. it will lower blood supply to skin.

B. it can make you feel tired

C. it can make skin come off

D. it can make blood run faster

68. It can be inferred from the study _______.

A. smoking won’t make skin protected from the sun age

B. smoking will do damage to skin rather than other organs

C. smokers over 65 usually won’t worry about their skin

D. the age of smokers is not connected with the result of the test

67.　 how wrinkled each person's skin doesn’t relate to_______.

A. the number of cigarettes a person smokes

B. the kind and characteristics of skin

C. how long a person smokes

D. how long skin is under sunlight

66. The best title for this passage would be_______.

A. The danger of smoking　　　　 B. A survey of smokers

C. Quit smoking for health　　　 D. Smoking causes skin aging

70．B考查细节理解。根据第四栏的The only caution that needs to be taken is not to have non-veg items on a daily basis．可知Santos建议不要天天吃肉类食物。所以选B。

D

[2010·山东利津一中模拟试题]

词数：288　 体裁：新闻　　 难度：3

CHICAGO (Reuters) - Smoking not only can wrinkle(起皱纹) the face and turn it yellow -- it can do the same to the whole body, researchers reported on Monday.

The study, published in the Archives of Dermatology, shows that smoking affects the skin all over the body -- even skin protected from the sun.

"We examined non-facial skin that was protected from the sun, and found that the total number of packs of cigarettes smoked per day and the total years a person has smoked were linked with the amount of skin damage a person experienced," Dr. Yolanda Helfrich of the University of Michigan, who led the study, said in a statement.

"In participants older than 65 years, smokers had significantly more fine wrinkling than nonsmokers. Similar findings were seen in participants aged 45 to 65 years," Helfrich's team added in their report.

The researchers tested 82 people, smokers and nonsmokers, taking pictures of the inner right arms. They ranged in age from 22 to 91 and half were smokers Independent judges decided how wrinkled each person's skin was.

When skin is exposed to sunlight, notably the face, it becomes coarse, wrinkled and discolored with a pale yellow tint, Helfrich's team wrote.

Several previous studies have found that cigarette smoking contributes to premature(过早的)skin aging as measured by facial wrinkles, the study said, but little has been done to measure the aging of skin not exposed to light.

The report did not discuss the mechanism involved but previous research has found that cigarette smoke, among other things, causes blood vessels(血管)beneath the skin to constrict(紧缩), reducing blood supply to the skin.

Smoking can also damage the connective tissue that supports both the skin and the internal organs.

69．A考查细节理解。根据第三栏的all the herbivorous animals have the similar dental structure，which clearly shows that the human being also 0Ilght to be vegetarian by birth可知食草动物的牙齿结构于人类的牙齿结构相似，所以Sai认为人类天生是素食的。