For centuries，writers and filmmakers have described wolves as big，bad killers.The（1）

B

B

is that humans have hurt wolves a lot more than they've hurt us.
   Gray wolves once ran across North America from coast to coast.Native Americans admired and（2）

B

B

them.Then European people came to the area.They killed many of the wolves' favorite （3）

C

C

，such as deer and moose（驼鹿）．
   The hungry wolves began eating livestock（牲畜） like sheep and cows，instead.People became （4）

C

C

and turned on the wolves.The government even paid people who killed a wolf！The wolves were never （5）

A

A

in Alaska.But by the 1960s，hunting had （6）

B

B

killed off the gray wolves in 48 states of America.They lived only in a small corner of Minnesota.
   In 1973，the US government passed the Endangered Species Act （ESA），a law that protects plants and animals in danger.The law made it illegal（非法的） to kill or harm gray wolves.
   Because of this，the wolf population is（7）

B

B

.More than 3，000 wolves now live in Michigan，Minnesota，and Wisconsin.So the government wants to take them off the endangered species （物种） （8）

B

B

in some states.Most people agree that the increase in the number of wolves is good news.But some people worry that （9）

C

C

the government does so，people will begin to kill wolves again soon.
   Wolves are （10）

A

A

to ecosystems.By hunting animals such as deer，wolves help to keep ecosystems balanced（平衡的）．

（1）A．problem	B．truth	C．agreement
（2）A．discovered	B．protected	C．pushed
（3）A．leaders	B．enemies	C．meals
（4）A．excited	B．surprised	C．angry
（5）A．in danger	B．in total	C．in order
（6）A．widely	B．nearly	C．lately
（7）A．disappearing	B．increasing	C．dropping
（8）A．chain	B．list	C．industry
（9）A．while	B．unless	C．if
（10）A．important	B．strange	C．pretty