Some of Man's closest relatives in the animal kingdom are under serious threat because of human activity, according to a recently published report.

Almost one in three of all apes and monkeys are now considered to be in danger of dying out and disappearing from our planet, if action is not taken soon.

The report, which was produced for the World Conservation Union (WCU), shows that 114 of the world's 394 kinds could be lost forever, and the main reason they are threatened is the continuing loss of forests where most of these animals live. In addition, illegal wildlife trade, climate change and commercial（商业的）hunting for meat are also endangering them.

What's more, the problem is getting worse. The number of species on the organization’s Red List has increased by 3 to 25 since 2005.

Russell Mittermeier, the main researcher of the WCU report, said, "You could fit(安置) all the surviving members of these 25 species in a single football stadium. So the problem is obviously urgent."

The scientists, who drew up the Red List, believe that the situation is now so bad that if action is not taken immediately, it will result in primate(灵长目动物) species dying out - something which has not happened in over a century.

The loss of habitat caused by the clearing of forests for wood, farmland and fuel continues to be the main reason for the decreasing number of primates, according to the report, and the problem was most severe in Asia.

The loss of forest trees is also responsible for 20 percent of all greenhouse gases - more than all the cars, trucks, trains and airplanes in the world combined.

小题1:What is the main subject of the report discussed in the text?

A．Climate change.

B．Loss of animal habitat.

C．Animal protection.

D．Endangered animals小题2:How many animals were on the Red List in 2005?

A．22

B．19

C．25.

D．28.小题3:The spokesman refers to 'a football stadium' in paragraph 5 to stress that ______.

A．the animals enjoy playing sports

B．these animals should be placed there for protection

C．there are not many of these animals left

D．the report was announced there小题4:What is the main cause of the greenhouse gas problem according to the text?

A．Airplanes.

B．Loss of trees.

C．Factory pollution.

D．Road vehicles.

材料一：2016年1月5日习 * * * * 在重庆召开推动长江经济带发展座谈会强调：长江是中 * * 的母亲河，也是中 * * 发展的重要支撑。推动长江经济带发展必须从中 * * 长远利益考虑，走生态优先、绿色发展之路，使绿水青山产生巨大生态效益、经济效益、社会效益，使母亲河永葆生机活力。长江拥有独特的生态系统，是我国重要的生态宝库，把修复长江生态环境摆在压倒性位置，共抓大保护，不搞大开发。

材料二：位于长江经济带的重要城市上海、武汉和重庆的红色旅游景区吸引大批游客，然而有的游客认为有钱就可以任性，在红色旅游景点景区内乱刻乱画乱扔烟头垃圾、随意攀爬纪念碑拍照……这反映了有的公民的文明素质与我国快速发展的旅游业还不相适应。这些公民在旅游活动中表现出来的不文明行为受到舆论批评和群众指责，也引起了国家关注。2015年4月6日国家旅游局出台《游客不文明行为记录管理暂行办法》引导游客文明旅劳，中国旅游协会多次发出倡议，号召广大游客践行社会主义核心价值现，强化文明出游意识，从我做起，从小事做起，为营造良好旅游环境、促进旅游文明发展尽一份力量。

结合材料一，运用系统优化方法的知识，分析说明“推动长江经济带发展必须从中 * * 长远利益考虑，走生态优先、绿色发展之路，使绿水青山产生巨大生态效益、经济效益、社会效益，使母亲河永葆生机活力”的理由。