求助一道语法题!1. A special scientist team has been formed to study the possible relationship between the unusual weather in Australia and ___ in Brazil and some other countries.A. the one B. the ones C. that D. those答案是选的C，我想问的是为什么不能选D，是不是指代的单复数一定要与前文的一致？

Cisco Express Forwarding has been enabled on router TK1.  With CEF， prefixes that require exception processing can be cached with one of which four special adjacencies？ （）

The relationship between employers and employees has been _____ studied

Why is divorce in Australia now easy?　　Because all one has to do is change one’s ____

On notification by Admiralty Notice to Mariners that a new edition of one of the books，or a new supplement to one，has been published，it should be obtained（）.

_____ a lot of money made the study abroad possible for him.

Despite the basic biological, chemical, and physical similarities found in all living things, a diversity of life exists not only among and between species but also within every natural population. The phenomenon of diversity has had a long history of study because so many of the variations that exist in nature are visible to the eye.　　1) It has been suggested that sexual reproduction became the dominant type of reproduction among organisms because of its inherent advantage of variability, which is the mechanism that enables a species to adjust to changing conditions.New variations are potentially present in genetic differences, but how preponderant a variation becomes in a gene pool depends upon the number of offspring the mutants or variants produce (differential reproduction). 2)It is possible for a genetic novelty (new variation) to spread in time to all members of a population, especially if the novelty enhances the population’s chances for survival in the environment in which it exists.Thus, when a species is introduced into a new habitat, it either adapts to the change by natural selection or by some other evolutionary mechanism or else it eventually dies off. Because each new habitat means new adaptations, habitat changes have been responsible for the millions of different kinds of species and for the heterogeneity within each species.　　The total number of animal and plant species is estimated at between 2,000,000 and 4,500,000; authoritative estimates of the number of extinct species range from 15,000,000 up to 16,000,000,000. 3)Although the use of classification as a means of producing some kind of order out of this staggering number of different types of organisms appears as early as the book of Genesis—with references to cattle, beasts, fowl, creeping things, trees, etc.—the first scientific attempt at classification is attributed to the Greek philosopher Aristotle, who tried to establish a system that would indicate the relationship of all things to each other.He arranged everything along a scale, or “ladder of nature”, with nonliving things at the bottom; plants were placed below animals, and man was at the top. 4)Other schemes that have been used for grouping species include large anatomical similarities, such as wings or fins, which indicate a natural relationship, and also similarities in reproductive structures.　　5)At the present time taxonomy is based on two major assumptions: one is that similar body construction can be used as a criterion for a classification grouping; the other is that, in addition to structural similarities, evolutionary and molecular relationships between organisms can be used as a means for determining classification.

_____ is defined as the study of the relationship between language and mind.

The relationship between employers and employees has been studied _____.

While several baseball teams have tried to supplant the Yankees as the dominant team in baseball, their inability has been unable to win even half as many World Series as the Yankees have won in the past one hundred years.

Practice 1Directions: You are asked to write in no less than 150 words about the title of Is It a Good Idea for Poor Students to Live Separately? And you should base your composition on the information given in English below:　　At the beginning of this new semester, a university in Jiangsu Province has found a visible way to help some of its poorer students: It has built some special dormitories for poor students. More than 100 of the school’s relatively poor students are now housed in these buildings. Besides simple facilities, the major difference between these and other dormitories is that the housing costs 500 yuan a year, but in other residence halls students have to pay 1200 yuan.　　1. Do you think this is a good idea to help the poorer students?　　2. Give at least two reasons to support you argument.　　3. Give some suggestions as to how to solve the problem.

From the passage, we can draw a conclusion that _____.