23．The fourth paragraph mainly talks about __________________.

A．how to comfort the patients　　

B．how to use trickery carefully

C．differences between trickery and promises　　

D．another feature of tact

23D考查判断推理。根据文章的结构可知，2、3、4段分别讲述了tact“圆滑”的三个特点。第四段是其中的一个。故选D。

22．According to the author, his mother’s praise for the brother is _______________.

A．both sensitive and tactful　　　 　 B．sensitive but not tactful enough

C．truthful but not tactful　　　　 　 D．sensitive but trickish

22B考查判断推理。根据If a person isn’t sensitive to another’s feelings, there is no way he or she can be tactful.和sensitivity alone does not make tact.可知选B。

21．When told he should “go Ajax” his teeth, Bill probably felt ________________.

A．surprised　 　　　　　　　　　　　　 B．cheated　　 　　

C．regretful　 　　　　　　　　　　　 D．painful

21D考查判断推理。根据Bill was crushed“Bill的精神被摧毁”和He could have showed this hurtful truth in a more careful, sensitive way“他本能用更小心、体贴的方法提出这一痛苦的事实。”可知选D。

70.　 C 考查作者写作意图。作者介绍了科学家们一份新的研究发现：吸烟会对人的身体各方面的产生影响，以此来告诉人们吸烟的害处，告诫人们要少吸烟。因此C项符合作者的意图。

69. A考查细节理解。由倒数第二段可知，吸烟能够引起血管变窄，使供应给皮肤的血液减少，因而诱发皮肤老化。故A项为正确答案。

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