[简答题]Illustrate lexical change proper with the latest examples in English, covering at least four aspects.

[填空题]Climate change has claimed its latest victim: Limacina helicina, a planktonic, predatory (捕食的) sea snail that’s a member of the taxonomic group more (36) known as sea butterflies. (The name is (37) from the wing-like lobes (叶瓣) the tiny creatures use to get around.) In a study (38) published in journal Proceedings of the Royal Society B, a group of scientists from the National Oceanic and Atmospheric Administration (NOAA. and Oregon State University have found that the Pacific Ocean’s decreasing pH—its acidifying (酸化), in other words—is dissolving L. helicina’s thin shells.
The researchers collected sea butterfly (39) from 13 sites along the Pacific coast (between Washington and southern California), going over each with a scanning electron microscope. More than half of the shells (53%) from onshore individuals (40) signs of "severe dissolution damage," while 24% of (41) individuals suffered dissolution damage. Th

[单项选择]What should host countries’ proper investment in environment include according to the communique
A. A vigorous private sector.
B. A legal framework.
C. A flexible labor market and prompt service of debt.
D. All above.

[单项选择]Proper lighting is a necessary for good eyesight even though human night vision can be temporarily impaired by extreme flashes of light.（）
A. needful
B. necessity
C. exigency
D. need

[填空题]Proper Physical Labor

[单项选择]　　WHY SHOULD anyone buy the latest volume in the ever-expanding Dictionary of National Biography I do not mean that it is bad, as the reviewers will agree. But it will cost you 65 pounds. And have you got the rest of volumes You need the basic 22 plus the largely decennial supplements to bring the total to 31. Of course, it will be answered, public and academic libraries will want the new volume. After all, it adds 1,068 lives of people who escaped the net of the original compilers. Yet in 10 years’’ time a revised version of the whole caboodle, called the New Dictionary of National Biography, will be published. Its editor, professor Colin Matthew, tells me that he will have room for about 50,000 lives, some 13, 000 more than in the current DNB. This rather puts the 1,068 in Missing Persons in the shade. 　　When Dr Nicholls wrote to The Spectator in 1989 asking for names of people whom readers had looked up in the DNB and had been disappointed not to find, she says that she received
A. because it is not worth the price.
B. because it has fewer entries than before.
C. unless one has all the volumes in his collection.
D. unless an expanded DNB will come out shortly.