1、【题目】The Native American interpreter Sacajawea was a valuable member of the Lewis and dark expedition in 1805.

选项：

A.veryfriendly

B.veryuseful

C.verythoughtful.

D.verywealthy

答案：

B

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】The economy of Dallas, Texas, is strong and diversified .

选项：

A.inflated

B.stable

C.varied

D.well-regulated

答案：

C

解析：

暂无解析

1、【题目】Anoversight遗漏(miss,overslaugh)inproofreadingoftenresultsinprintederrors.

选项：

A.Aninconsistency

B.Adiscrimination

C.Ablotch

D.Aninattention

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】While Billie Holiday did not invent the music called "the blues", she most assuredly helped popularize it.

选项：

A.finally

B.certainly

C.earnestly

D.enthusiastically

答案：

B

解析：

暂无解析