1. the world travels of Ernest Hemingway, an American novelist and short-story writer, _____ the background of much of his writing.A) Formed （正确）
B) he formed
C) while forming
D) was formed (我选的)
删掉所有修饰成分，实际上这个句子应该是“the world travels the background”，大意是“世界旅行构建了背景”，缺少动词，没有被动的意思，过去时选择formed。
2. the continued efforts of the organization, Mothers Against Drunk Driving, or MADD,____ alsohol related deaths by 43 percent since 1980.
A) which helped reduce（我选的）
B) is helping reduce
C) helps to reduce
D) have helped reduce（正确）
逗号中间的部分是同位语，第一个逗号前明显只有名词部分，最后一个逗号后也没有谓语成分，要构成一个句子缺少谓语动词，A就肯定不能选了。同时由于since表明了时态应该是现在完成时，所以选D
3. baby carriers and digging sticks____ in many cultures today are examples of the earliest tools used by humans.
A) that are still using
B) which still used （我选的）
C) still used （正确）
D) still using
可以看出缺失的部分是一个定语，做定语可以是形容词、分词或是定语从句，baby carriers 和 digging sticks肯定不能是自己用，而是被使用，所以应该使用过去分词表被动，选项C正确。若B改为which are still used就是正确的。
4. it is only recently that ballets have been based on themes____ American life.
A) that reflect（正确）
B) reflects
C) is reflecting
D) reflected（我选的）
由于句中已有动词，所以这里肯定不能选动词，主题反映美国生活，没有被动含义，不能使用过去分词，定语从句that reflect...正确。若使用reflecting也是正确的。
5. it is good form to use the name of the person____
A) who are greeting （我选的）
B) you are greeting （正确）
C) which you are greeting
D) greeting for you
＝＝这个……你再读一遍？who you are greeting，省略who。楼主看来对主动被动很棘手啊……
6. the ability to communicate ideas and instructions was_____ for the incredible development of the frontal brain lobe in human beings.
A) necessary all that（我选的）
B) all that was necessary（正确）
C) all the necessities that
D) such that all he necessities
＝＝不能理解你为什么会选A……所以我无法解释……
7. _______ mechanical device has ever been invented that can satisfactorily replace teasel flower beads for raising the nap on cloth.
A) no （正确）
B) not the
C) never has a
D) there is no （我选的）
句子已经有动词了，所以C和D肯定不能选，要修饰mechanical device肯定只能选no
8. the superior efficiency of solar energy houses _______ reflects years of experiment, research and refinement.
A) over traditional electrically heaed ones（正确）
B) ore than traditional electrically heated ones
C) above traditional electrically heated ones
D) instead of traditional electrically heated ones（我选的）
over，超过的意思，感觉也没什么好解释的，instead of的话缺少一个动词，using A instead of B。
9. Benjamin Franklin, a practical man_____ many stories have been told, was unusually productive.
A) of
B) about whom（正确）
C) about
D) of which（我选的）
修饰人怎么能用which呢？
10. ________the lip of an open-pit copper mine, the huge tractors and cranes below look like toys, and people look like tiny ants scurrying about.
A) WHERE
B) While（我选的）
C) That
D) From（正确）
想问一句你选while是什么意思呢？这里是个地点状语，从铜矿山边缘看去，拖拉机起重机就像玩具，而人们就像忙碌的小蚂蚁。
11. not only _____ atoms with their microscopes, but thy now can also “feel” them with the aid of a versatile sensing device called the “magic wrist”.
A) are today’s scientists able to see（正确）
B) able to see today’s scientists are
C) today’s scientists are able to see
D) are able to see today’s scientists（我选的）
倒装只要提前系动词或者助动词就可以了
12. in the seventeenth century, north America was vast and unconquered,_____ only at great cost.
A) it promised riches but yielded its bounty
B) promising riches but yielding its bounty（正确）
C) by promising riches but by yielding its bounty（我选的）
D) its riches were promised but its bounty yielded
前面又没有提到什么方法，为什么要用by呢？没有修饰对象。North America was ... 过去进行时。
13．It is possible _____ may assist some trees in saving water in the winter..
A) the leaves are lost
B) when leaves have lost
C) that the loss of leaves（正确）
D) to lose leaves(我选的)
it is possible ＋that 从句，从句中缺主语，选C。形式主语it不只可以指代to do不定式，也可指代从句。
14．In the 1820’s physical education became _____ of the curriculum of Harvard and Yale Universities.
A) to be part（我选的）
B) which was part
C) was part
D) part（正确）
已经有了动词became了，当然选part就好了。
15. just off the Massachusetts coast ___ , a popular summer resort area.
A) Martha’s Vineyard is
B) Is where Martha’s Vineyard（正确）
C) Martha’s Vineyard
D) Is Martha’s Vineyard
off...是个地点状语，因此对应起来只能用where了，Martha’s Vineyard 做定语修饰where
16. in practice,setting up a chain of command in a business can be a very complicated task, ___ it involves the interaction of real human beings.
A) Because of
B) How
C) As（正确）
D) Due to
表原因，后面是个从句，because of 和 due to都不能接从句，how的意思不对，只能用As了。 
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发表于 2005-6-20 15:03:00
楼主
