3道gwd语法求讲解

kingsonosgnik

27. GWD21-Q27:

The electronics company has unveiled what it claims to be the world’s smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs less than 11 ounces.



A.to be the world’s smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs

B.to be the smallest network digital camcorder in the world, which is as long as a handheld computer, weighing
C.is the smallest network digital camcorder in the world, which is as long as a handheld computer, and it weighs

D.is the world’s smallest network digital camcorder, which is as long as a handheld computer and weighs

E.is the world’s smallest network digital camcorder, the length of which is that of a handheld computer, weighing

是不是说，由于what it claims没有that ，所以这是一个插入语？
还有后面那个weighting，可以跳跃修饰digital camcorder吗？


20. GWD26-Q20

In 1981 children in the United States
spent an averageof slightly less than two and a half hours a week doinghousehold chores; by 1997 they had spent nearly six hours a week.


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

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

C.chores, whereas nearly six hours a week werespent 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



B为什么可以用过去完成时？1997是1981以后呀！

Q6 :TT-GWD 2-34.

NASA’s methodical approach to the exploration of Mars has not yet answered the questions of whether biological life forms ever emerged on Mars and whether, presuming such life forms having left fossil traces to begin with, those traces can still exist in some moist recesses of the cold and arid planet.



A.and whether, presuming such life forms having left fossil traces to begin with, those traces can

B.and whether, if it is presumed that such life forms left some fossil traces to begin with, can those traces

C.and whether, presuming such life forms left fossil traces to begin with, those traces 可以少that?

D.and, presuming such life forms did leave some fossil traces to begin with, if they can

E.and, presuming such life forms to have left fossil traces to begin with, if they



谁能分析一下c 的结构？我觉得c也不对，因为 presuming such life forms left fossil traces to begin with 中，preseming后面少了that,    life forms left fossil traces to begin with 是一个完整的句子，相当于presuming引导了一个从句
我哪里弄错了？希望各位教我，非常感谢！

kingsonosgnik

放了一天了，怎么没人帮我。。。