求助几道GWD语法题~~急~~

aqua0221

Although she had been known as an effective legislator first in the Texas Senate and later in the United States House of Representatives, not until Barbara Jordan’s participation in the hearings on the impeachment of President Richard Nixon in 1974 was she made a nationally recognized figure, as it was
televised nationwide.

1. later in the United States House of Representatives, not until Barbara Jordan’s participation in the hearings on the impeachment of President Richard Nixon in 1974 was she made a nationally recognized figure, as it was
   
   
   
2. later in the United States House of Representatives, Barbara Jordan did not become a nationally recognized figure until 1974, when she participated in the hearings on the impeachment of President Richard Nixon, which were
   
   
   

later in the Untied States House of Representatives, it was not until 1974 that Barbara Jordan became a nationally recognized figure, with her participation in the hearings on the impeachment of President Richard Nixon, which was

then also later in the United States House of Representatives, not until 1974 did Barbara Jordan become a nationally recognized figure, as she participated in the hearings on the impeachment of President Richard Nixon, being

then also later in the United States House of Representatives, Barbara Jordan did not become a nationally recognized figure until 1974, when she participated in the hearings on the impeachment of President Richard Nixon, which was


为什么是which were啊？

2. Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity.

1. the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries
   
   
   
2. the shuttle and earlier spacecraft, with sufficient enough power in fuel cells and batteries for their short flights
   
   
   
3. the short flights of the shuttle and earlier spacecraft, which enabled them to carry sufficient enough power in fuel cells and batteries
   
   
   
4. the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights
   
5. the flights of the shuttle and earlier spacecraft, whose shortness allowed them to carry sufficient power in fuel cells and batteries
   
   
   
   
   

Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity.

1. the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries
   
   
   
2. the shuttle and earlier spacecraft, with sufficient enough power in fuel cells and batteries for their short flights
   
   
   
3. the short flights of the shuttle and earlier spacecraft, which enabled them to carry sufficient enough power in fuel cells and batteries
   
   
   
4. the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights
   
5. the flights of the shuttle and earlier spacecraft, whose shortness allowed them to carry sufficient power in fuel cells and batteries
   
   
   
   
   

为什么还是which were?还有B哪里错了？

3.

In 1981 children in the United States

spent an average

of slightly less than two and a half hours a week doing household chores; by 1997 they had spent nearly six hours a week.




A.      chores; by 1997 they had spent nearly six hours a week

B.     chores; by 1997 that figure had grown to nearly six hours a week

C.     chores, whereas nearly six hours a week were spent in 1997（？？？）

D.     chores, compared with a figure of nearly six hours a week in 1997

E.      chores, that figure growing to nearly six hours a week in 1997

C选项哪里错了？

4.
The Near Earth Asteroid Rendezvous (NEAR) spacecraft will orbit the asteroid Eros for a year, slowly moving closer to the surface of the object to make ever more precise measurements that scientists hope will enable them to understand how the solar system formed some four billion years ago.

1. to make ever more precise measurements that scientists hope？？？ will enable them to
   
   
   
2. to make ever more and more precise measurements, which scientists are hoping to enable them  
   
   
   
3. for making ever more precise measurements, and scientists hope that they will be able to
   
   
   
4. with the purpose of making more precise measurements than ever, and which scientists hope will enable them to
   
   
   
5. in order to make more precise measurements than it ever did, and scientists are hoping they will be able to
   
   
   

帮忙分析下A选项的句子结构~
帮忙分析下A选项的句子结构~

5.

In 1994 the white house named Dr RuthR. Faden chairperson of the federal advisory committee of experts they assigned to do a report on the history and ethics of the government’s radiation experiments on humans in the 1950’s and 1960’

s .




A.          they assigned to do

B.          to be assigned doing

C.         that was being assigned doing

D.         assigned for doing

E.          it assigned to do



不理解~~~it指代什么？？

希望好心的NN们帮忙解答下吧，感激不尽啊~~~

不理解~~~it指代什么？？

希望好心的NN们帮忙解答下吧，感激不尽啊~~~
刚才不知道怎么回事发上来乱了，现在好了~~

zhaoyiqing

第3题出的不太好～～唉

zhaoyiqing

1 WHICH WERE 使得WHICH指代 HEARINGS 无歧义
2 B  ENOUGH 错
3 it 指 White House