题目内容
（请给出正确答案）
Whooping cranes are native to__________. 查看材料
A.Mexico
B.South America
C.North America
D.The Persian Gulf
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Operation Migration
Whooping cranes migrate in winter to__________. 查看材料
A.find warmth and food
B.raise baby whooping cranes
C.get human help
D.lay eggs
A.120miles
B.1，200miles
C.1，931miles
D.2，000miles
A.follow airplanes south every year
B.live in Canada all year round
C.learn to migrate on their own
D.be unable to fly back
Operation Migration aims to__________. 查看材料
A.teach adult cranes how to fly
B.lead young cranes on their first trip south
C.breed cranes in special parks
D.transport cranes to the North
Heracles cranes are capable of lifting the______loads among its competitors.
A．heavy
B．heavily
C．heavier
D．heaviest
Stephen Cranes ______ is the first naturalist novel in American literature.
A．Maggie, a Girl of the Streets
B．The Blue Hotel
C．The Red Badge of Courage
D．War Is Kind
A.toss
B.increase
C.hoist
D.enhance
听力原文：(A) The panes are in the frames.
(B) The planes are at their gates.
(C) The trains are in the station.
(D) The cranes are on the wharf.
A．
B．
C．
D．
However, the first two phases of the conservation movement had serious limitations. The new laws allowed certain animals to increase so much that they actually "ate up" their habitat. Many of them starved to death because the land simply could not provide for them all. Something had to be done. This is how careful wildlife management came into being.
One of the chief concerns of wildlife management is the protection and improvement of the natural habitat so that animals have enough food and water to survive. Wildlife management involves care of the soil to produce good vegetation. It involves care of plants and bushes, not only as a source of food, but also as protection. Animals needs cover to hide from their natural enemies and to raise their young safely.
Just as crops are harvested, wildlife too must sometimes be "harvested." By allowing limited hunting and fishing, good management can control certain species that threaten to overpopulate their habitat.
Another major part of the wildlife management is the increasing of certain species by artificial means. Some creatures, like the whooping crane, were brought back from the edge of extinction in this way. In order to save these species, members of wildlife teams have reared the young in the safety of research stations.
The passage is mainly about ______.
A．the history of the wildlife conservation movemen
B．the preservation of wildlife through laws
C．wildlife management as a new approach
D．protection and improvement of the habitat of animals
