[单项选择]Practically all species of animals communicate either through sounds or through soundless codes.
A. Simultaneously
B. Almost
C. Absolutely
D. Basically

[单项选择]Practically all species of animals communicate either through sounds or through a large repertory of soundless codes.（　）
A. Simultaneously
B. Almost
C. Absolutely
D. Basically

[单项选择]{{U}}Practically{{/U}} all animals communicate either through sounds or through soundless codes.
A. Certainly
B. Probably
C. Almost
D. Absolutely

[单项选择]Practically all animals communicate either through sounds or through soundless codes（　）.
A. Certainly
B. Probably
C. Almost
D. Absolutely

[单项选择]Practically all animals communicate through sounds.（　）
A. Clearly
B. Almost
C. Absolutely
D. Basically

[单项选择]{{U}}Practically{{/U}} all animals communicate through sounds
A. Almost
B. Clearly
C. Absolutely
D. Basically

[单项选择]Many rare species of plants and animals are threatened with ______ with the worsening of environment and mass hunting.


A. extinction
B. migration
C. destruction
D. extraction

[简答题]Animals Do you like animals

[单项选择]_______ one-celled organisms, nearly all animals have a nervous system of some kind.


A. Some
B. The
C. Except for
D. De Spite

[单项选择]Without animals and the information the animals gave, it （）man much longer to go into space.
A. would take
B. took
C. had taken
D. would have taken

[简答题]Passage 2 Endangered Species Endangered species are plants and animals that are in immediate danger of extinction. Extinction is actually a normal process in the course of evolution. Since the formation of the earth, many more species have become extinct than those exist today. These species slowly disappeared because of changes of climate and their failure to adapt to such conditions as competition and predation (捕食). Since the 1600s, however, the process of extinction has greatly accelerated as a result of both human population growth and technological encroachment (侵犯) on natural ecology systems. Today the majority of the world’s environments are changing faster than the ability of most species to adapt to such changes through natural selection. Species become extinct or endangered for a number of reasons, but the primary cause is the destruction of natural habitats (栖息地). Drainage of wetlands (沼泽地), cutting and clearing of forests, growth of cities, and highway
A. A．Human beings are not aware of the importance of preserving endangered species.
B．Some endangered species have already reached the end of their life span in evolution.
C．The development of human society has greatly affected natural ecology systems.
D．The world’s climate has changed so greatly that most species cannot survive.

[简答题]志愿者活动 help animals