蓝皮求教6题

1.在定从中含一个宾从而先行词做宾从的主语，定从引导词that是不是不能省？

eg.

Astronomers at the Palomar Observatory have discovered a distant supernova explosion,one ________ a type previously unknown to science.

A.they believe that is

B.they believe to be of

A错，是不是因为they前还少一个that

2.younger and older people是等于the younger and older还是the younger and the older还是别的？

3.

  Sunspots,vortices of gas associated with strong electro-magnetic activity,__________the Sun's poles or equator.

A.are visible as dark spots on the surface of the Sun but have never been sighted on

  The Iroquois were primarily planters,_______their cultivation of maize,squash,and beans with fishing and hunting.

A.but supplementing

这两题中，前一题A对，后一题A错，是不是因为前一题A中的but前无逗号算作句子的省略，而后一题but前有逗号不算句子
            

4.In the 1980's the rate of increase of the minority population of the United States was nearly _______ the 1970's.

B.twice as fast as it was in

C.twice what it was in

B错哪，C为何对

5.Clark and Florence , a husband-and-wife medical team ,worked steadily and efficiently through the night,but__________.

C.as they sipped their coffee the next morning,she noticed that he seemed disoriented

D.as they were sipping their coffee the next morning,he seemed,she noticed,disoriented

D错是不是因为不能将she noticed that he seemed disoriented改为he seemed,she noticed,disoriented（如果是，为什么？）

6.It is an oversimplified view of cattle raising to say that____________drive them to market when the time is ripe.

C.all one has to do with cattle is leave them alone while they feed themselves and then corral them and

C为何对（is leave?）

谢谢赐教，SAVE RP FOR GMAT

3.
                Sunspots,vortices of gas associated with strong electro-magnetic activity,__________the Sun's poles or equator.

A.are visible as dark spots on the surface of the Sun but have never been sighted on

The Iroquois were primarily planters,_______their cultivation of maize,squash,and beans with fishing and hunting.

The Iroquois were primarily planters,_______their cultivation of maize,squash,and beans with fishing and hunting.

A.but supplementing

这两题中，前一题A对，后一题A错，是不是因为前一题A中的but前无逗号算作句子的省略，而后一题but前有逗号不算句子

这两题中，前一题A对，后一题A错，是不是因为前一题A中的but前无逗号算作句子的省略，而后一题but前有逗号不算句子

前一题并没有省略动词，而是省略了主语。后一题错是因为but后面应有动词，所以ing形式不对。 

4.In the 1980's the rate of increase of the minority population of the United States was nearly _______ the 1970's.

B.twice as fast as it was in

C.twice what it was in

B错哪，C为何对

rate只能说high/low，不能说fast

C中，twice sth...意思是两倍于sth，是对的。

5.Clark and Florence , a husband-and-wife medical team ,worked steadily and efficiently through the night,but__________.

C.as they sipped their coffee the next morning,she noticed that he seemed disoriented

D.as they were sipping their coffee the next morning,he seemed,she noticed,disoriented

D错是不是因为不能将she noticed that he seemed disoriented改为he seemed,she noticed,disoriented（如果是，为什么？）

没有从句的话很难搞清楚或者容易混淆到底谁是这半句话的主语，到底是she还是he，并且有两个动词同时出现而没有连词或者从句的话，也是有问题的。

6.It is an oversimplified view of cattle raising to say that____________drive them to market when the time is ripe.

C.all one has to do with cattle is leave them alone while they feed themselves and then corral them and

C为何对（is leave?）

简化句子：all one has to do is do...这里的has to是不能分割的，也就是说这里的to do并不是不定式，has to = need

all one needs do is do... 这样就平行了

BE动词直接加VERB原形存在吗（is leave）？谢谢