请教一道大全！

cyt1111111

1.       The Audubon Society and otherconservation groups, concerned over what they have perceived to be theserious threatening of the environment as posed by the policies of thegovernment, are preparing for a major political effort.

(A) have perceivedto be the serious threatening of the environment as

(B) perceived asthe serious threat to the environment as

(C) perceive beingthe serious threat to the environment

(D) are perceivingas the serious threatening of the environment（E）

(E) perceive asthe serious threat to the environment
为什么不是B呢

cyt1111111

frey83 发表于 2015-6-12 16:46
an idea... that ( ) in the past
in the past表示在过去一直是这样，所以用be而不用become ...

好的，谢谢！

frey83

cyt1111111 发表于 2015-6-12 16:41
麻烦看看这道题：The debate over bilingualeducation centers on the issue of whether the United Stat ...

an idea... that ( ) in the past
in the past表示在过去一直是这样，所以用be而不用become

cyt1111111

frey83 发表于 2015-6-12 16:19
前面打错了，是ed没有说明动作发出的人

麻烦看看这道题：The debate over bilingualeducation centers on the issue of whether the United States should foster theidea of single common language, an idea, some believe, that has in the past beencrucial in binding diverse constituencies together.
(A) been crucialin binding diverse constituencies together
(B) been crucialas a binding together of diverse constituencies
(C) been crucialto bind together constituencies that are diverse
(D) become crucialin binding together diverse constituencies（A）
(E) become crucialto bind together constituencies that are diverse
为什么不选D

frey83

cyt1111111 发表于 2015-6-12 16:11
那698的E为什么不对呢

前面打错了，是ed没有说明动作发出的人

cyt1111111

cyt1111111 发表于 2015-6-12 15:48
1.       The cameras of the Voyager IIspacecraft detected six small, previously unseen moons circlin ...

那698的E为什么不对呢

cyt1111111

1.       The debate over bilingualeducation centers on the issue of whether the United States should foster theidea of single common language, an idea, some believe, that has in the past beencrucial in binding diverse constituencies together.

(A) been crucialin binding diverse constituencies together

(B) been crucialas a binding together of diverse constituencies

(C) been crucialto bind together constituencies that are diverse

(D) become crucialin binding together diverse constituencies（A）

(E) become crucialto bind together constituencies that are diverse
为什么不选D

cyt1111111

1.       The data collected by weatherairplanes that fly into the heart of a hurricane are useful mainly for gaugingthe storm’s structure and strength, not for the speed and the path of theirmovement.

(A) not for thespeed and the path of their movement

(B) not for thespeed and path of its movement

(C) not the speedand path of its movement

(D) and not thespeed and path of their movements（C）

(E) and not forthe speed and the path of its movements
为什么不选E

cyt1111111

     The Commerce Departmentannounced that the economy grew during the second quarter at a 7.5 percentannual rate, while inflation eased when it might have been expected for itto rise.

(A) it might havebeen expected for it to rise

(B) it might havebeen expected to rise

(C) it might havebeen expected that it should rise

(D) its rise mighthave been expected（B）

(E) there mighthave been an expectation it would rise

D为什么不对

frey83

1. perceived as the threat, posed by xxx是分词作threat的修饰语；
696. e中的aim to不对，应该是aim at/with the aim of
698. 第一个it指代bank,第二个they指代payments。这题要看语义，意思是银行不希望在有拖欠贷款的时候再去放贷；d和e没有说明是银行不期望放贷，改变了原句的意思。