语法与词汇Although salmon may travel hundreds of miles from where they were spawned, they will ultimately return there to lay eggs
语法与词汇Because excessively hunting has depleted many wild life species, preservation zones for wild animals are being established in some provinces
语法与词汇When ancient artifacts have been________ to these processes, their origin is usually impossible to trace
语法与词汇Its success was instantaneous, though neither the host nor Mr
语法与词汇Chimpanzee society is male-dominated and features strong bonds between adult males and________ ties between females
语法与词汇Printmaking is the generic term for a number of processes, of which woodcut and engraving are two________examples
语法与词汇Life insurance, before available only to young, healthy persons, can now be obtained for old people and even for pets
语法与词汇To win an election, a candidate needs to tour at least a third of the 600 villages that make up an average parliamentary________
语法与词汇One kind of female butterfly mates only once in its life, and then it closes its wings to avoid harassment when pursued by persistent males
语法与词汇Though iPads and E-readers have increasingly better screen clarity, the idea that everytime a person reads a book，newspaper or magazine，what they will require an energy source is frightening
语法与词汇So the theories of the schools are different from the practice of ordinary business that much of which he learned in the former will have to be unlearned in the latter
语法与词汇To save money on the companionsfare, the rescue centers________help from vacationers already holding a plane ticket home
语法与词汇In this hero of the film , you see a new image of the Chinese man, quite different from the________ portrayed in popular Hollywood movies
语法与词汇Perhaps what enchants most fans of all ages and from all regions about cartoons is their adolescent exuberance, their unique glorification of the dreams and their imagery of the youth
语法与词汇We wanted to minimize colors and materials, really kind of keeping things tranquil
语法与词汇A man without an education, many of us believe, is an unfortunate victim of adverse circumstances, deprived of many great opportunities in this changing world:
语法与词汇Scientists are pushing known technologies to their limits in an attempt to ________ more energy from the earth
语法与词汇The undulating waves of the sea are generated by three natural causes: wind, earth tremors, and the gravitational pull of the moon and the sun
语法与词汇The impossible high demands you make of yourself will invite only disappointment and widespread unhappiness
语法与词汇It is very easy to learn how to speak and write correctly, and for all purposes of ordinary conversation and communication, only about 2,000 different words are________