The United States In 1782 【51】 the United States won its independence, the bald eagle was chosen 【52】 the national bird of the new country. American leaders wanted the eagle to be a 【53】 of their country because it’’s a bird of strength and courage. They chose the bald eagle because it was found all over North America and only in North America. But a little over 200 years 【54】 ,the bald eagle had almost disappeared from the country, In 1972, there were only 3,000 bald eagles in the entire United States. The reason for the birds 【55】 population was pollution, especially pollution of rivers by pesticides. Pesticides are chemicals 【56】 to kill insects and other animals that attack and destroy crops. 【57】 , rain often washes pesticides into rivers. Pesticides pollute the rivers and poison the fish. Eagles eat 【58】 and the poison 【59】 their eggs. The eggs have very thin shells and do not hatch. Eagles 【60】 only two or three eggs a year. Because many of the eggs did not 【61】 and produce more eagles, 【62】 eagles quickly 【63】 smaller. Today, the American Government and the American people are trying to protect the bald eagle. The number of bald eagles 【64】 It now appears 【65】 the American national bird will survive and remain a symbol of strength and courage. -综合类-总题库

The manager came over and asked the customer how ______.

A:did the quarrel came about B:the quarrel had come about C:had the quarrel come about D:have the quarrel come about

It was not until then that I came to realize that knowledge from practice.（　）

A:comes B:has come C:came D:had come

It was not until then that I came to realize that knowledge from practice.（）

A:comes B:has come C:came D:had come

It was not until then that I came to know knowledge （）only from practice.

A:had come B:has come C:came D:comes

It was at the exhibition that we {{U}}came across{{/U}} this kind of minicar which is made of plastics.

A:came up B:came upon C:came out D:came up with

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The United States