Animalshavebeenkilledfortheirfurandfeathers,and  61．  (...

问题详情：

Animals have been killed for their fur and feathers, and   61．   (thousand) of kinds of animals have disappeared from the world forever. About 170 kinds in the US alone    62．     (consider) in danger.

Why should people care?    63．    we need animals, and if they are gone, there will never be any more. Every animal has its place in the balance of nature.    64．    (destroy) one kind of animal can create many problems. For example, when farmers killed large numbers of hawks (老鹰), the farmers’ stores of corn and grain were destroyed    65．   rats and mice. With no hawks to keep down their numbers, the rats and mice multiplied (繁殖)    66．    (quick).

Luckily, some people are working    67．    (help) save the animals. Some groups raise money to let people know about    68．   problem. And they try to get the governments to pass laws protecting animals in danger. Quite a few   69．    (country) have passed laws. These laws forbid the killing of any animals on the danger list. Slowly, the number of some animals in danger    70．    (be) growing.

【回答】

61．thousands  62．are considered  63．Because  64．Destroying  65．by

 66．quickly   67．to help  68．the  69．countries  70．is

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