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】Someseaurchins海胆havevenomous(toxin)spines

选项：

A.sensuous(feeling)

B.crooked(twisted)

C.poisonous

D.sticky

答案：

解析：

1、【题目】Bats fly, rather than glide, and thus are the only mammals capable of true flight.

选项：

A.straight

B.safe

C.real

D.rapid

答案：

C

解析：

暂无解析

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】Somechildrendisplayanunquenchable难以抑制的curiosityabouteverynewthingtheyencounter.

选项：

A.insatiable贪的无厌的

B.inherent

C.indiscriminate不加选择的

D.incredible

答案：

解析：

1、【题目】ThecompanyissuesanannualreporteveryMarch.

选项：

A.ayearly

B.acomprehensive

C.afinancial

D.aproduct

答案：

解析：

1、【题目】TheNativeAmericaninterpreterSacajaweawasavaluablememberoftheLewisanddarkexpeditionin1805.

选项：

A.veryfriendly

B.veryuseful

C.verythoughtful.

D.verywealthy

答案：

解析：