1. 用5 句话表述全部内容。

4. 餐宴礼节。

[写作要求]

3. 接收礼物时的回应方式；

2. 对赞美的回答方式；

1. 见面时的问候方式；

60. What does the author mainly discuss in the text?

　 A. Technology. B.Sustainability. C. Ethanol energy. D. Environmental protection .

基础写作

假设你是李华。你的外国笔友Jane打算于七月来中国，特来信了解中国人的社交习俗。请你用英语回一封信，从以下几个方面作具体介绍。

[写作内容]

59. The author thinks that replacing gas with corn ethanol is　　　　　　　 .

　 A. impractical　 B. acceptable　　 C. admirable　　 D. useless

58. The underline word “it” in the second paragraph refers to “　　　　　　　 ” .

　 A. the energy benefit　　　　　　　 B. the forest loss

　 C. climate change　　　　　　　　　 D. burning ethanol

57. What might directly cause the loss of the forest according to the text?

　 A. The growing demand for energy to make ethanol.

　 B. The increasing carbon dioxide in the air.

　 C. The greater need for farmland. D. The big change in weather.

56. The report from NHTSA suggests that　　　　　　　 .

　 A. fewer people were injured in crosswalks

　 B. crosswalk safety has been greatly improved

　 C. much has been done to reduce traffic accidents

　 D. pedestrian deaths in crosswalk remain a serious problem

E

All too often, a choice that seems sustainable(可持续的)turns out on closer examination to be problematic. Probably the best example is the rush to produce ethanol(乙醇)for fuel from corn. Corn is a renewable resource -you can harvest it and grow more, almost limitlessly. So replacing gas with corn ethanol seems like a great idea .

One might get a bit more energy out of the ethanol than that used to make it, which could still make ethanol more sustainable than gas generally, but that’s not the end of the problem. Using corn to make ethanol means less corn is left to feed animals and people, which drives up the cost of food. That result leads to turning the fallow land - including, in some cases, rain forest in places such as Brazil - into farmland, which in turn gives off lots of carbon dioxide(CO2)into the air. Finally, over many years, the energy benefit from burning ethanol would make up for the forest loss. But by then, climate change would have progressed so far that it might not help.

You cannot really declare any practice “sustainable” until you have done a complete lift-cycle analysis of its environmental costs. Even then, technology and public policy keep developing, and that development can lead to unforeseen and undesired results. The admirable goal of living sustainably requires plenty of thought on an ongoing basis.