1、【题目】The future survival of the bald eagle is still an important American ecological concern.
选项：
A.migration
B.population
C.existence
D.evolution
答案：
C
解析：
暂无解析
1、【题目】 All living organisms, regardless of their unique identity, have certain biological, chemical, and physical characteristics in common.
选项：
A.asaresultof
B.considering
C.cognizantof(consciousof,awareof)
D.whatever
答案：
D
解析：
暂无解析
1、【题目】Insectpestsareamongtheleadingcausesofcropfailure.
选项：
A.expected
B.chief
C.natural
D.least
答案：
解析：
1、【题目】Urban renewal programs strive to upgrade areas that are becoming slums.
选项：
A.reproach
B.improve
C.fortify
D.uproot
答案：
B
解析：
暂无解析
1、【题目】In calculating the daily calorie requirements for an individual, variations in body size, physical activity, and age should be taken into account.
选项：
A.numbered
B.stabilized
C.contrasted
D.considered
答案：
D
解析：
暂无解析
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