1、【题目】In 1861 it seemed inevitable that the Southern states would break away from the Union.
选项：
A.strange
B.certain
C.inconsistent
D.proper
答案：
B
解析：
暂无解析
1、【题目】Insect pests are among the leading causes of crop failure.
选项：
A.expected
B.chief
C.natural
D.least
答案：
B
解析：
暂无解析
1、【题目】In 1974 Henry Aaron broke Babe Ruth's monumental lifetime record of 714 home runs.
选项：
A.archaic(old,antique)
B.degrading(discredit)
C.outstanding
D.entire
答案：
C
解析：
暂无解析
1、【题目】The Salk vaccine is a major factor in the fight to eradicate polio.
选项：
A.completelydestroy
B.carefullydisguise
C.sustain
D.contain
答案：
A
解析：
暂无解析
1、【题目】A mythical(imaginary) creature, the dragon was believed to have lion's claws, scaly skin, and fiery breath.
选项：
A.legendary
B.magical
C.frightening
D.perplexing
答案：
A
解析：
暂无解析
1、【题目】In1861itseemedinevitablethattheSouthernstateswouldbreakawayfromtheUnion.
选项：
A.strange
B.certain
C.inconsistent
D.proper
答案：
解析：
1、【题目】The controls of most modern airplanes can be operated either manually or automatically.
选项：
A.bythebook
B.byamap
C.bylogic
D.byhand
答案：
D
解析：
暂无解析
1、【题目】When carbon is added to iron in the proper proportions , the result is steel.
选项：
A.container
B.sequence
C.laboratories
D.amounts
答案：
D
解析：
暂无解析
1、【题目】Some animals pant and sweat to speed evaporation of body moisture and thus cool themselves.
选项：
A.wiggle摆动slowly
B.breathequickly
C.rest
D.perspire
答案：
D
解析：
暂无解析
1、【题目】ThefuturesurvivalofthebaldeagleisstillanimportantAmericanecologicalconcern.
选项：
A.migration
B.population
C.existence
D.evolution
答案：
解析：
1、【题目】Communicationisoneofthemostimportantbondsthatholdculturalsystemstogether.
选项：
A.obligations
B.qualities
C.links
D.needs
答案：
解析：
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