急，GWD 有几道不会 求帮助啊亲们

梓陌

1。 A recent review of pay scales indicates that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times in 1980.

1. that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times
   
   
2. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, a ratio that compares to 42 times
   
   
3. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, as compared to 42 times their pay, the ratio
   
   
4. CEO’s who now earn on average 419 times more pay than blue-collar workers, as compared to 42 times their pay, the ratio
   
   
5. CEO’s now earning an average of 419 times the pay of blue-collar workers, compared to the ratio of 42 times
   
   A里面是不是than后面变成that of blue-collar workers 就可以了？
   
   
   Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion than it was in any previous election.
   
   
   
   
   1. a greater proportion than it was
      
      
   2. a greater proportion than
      
      
   3. a greater proportion than they have been
      
      
   4. which is greater than was so
      
      
   5. which is greater than it has been
      
   不太明白为什么A不可以啊？
   
   
   The ancient Anasazi harvested such native desert vegetation as the purple-flowered bee plant, what they now commonly call wild spinach in northern Arizona and other parts of the southwestern United States.
   
   
   
   
   1. what they now commonly call
      
      
   2. a plant that they now commonly call
      
      
   3. now commonly called
      
      
   4. and is mow commonly called
      
      
   5. which it is now commonly called
      
   
   B的话为什么不行呢？ 是不是因为they有歧义呢？
   To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.
   
   
   
   
   1. have to know a great deal more than now about the social and economic
      
      
   2. have to know a great deal more than they do now about the social and economical
      
      
   3. would have to know a great deal more than they do now about the social and economical
      
      
   4. would have to know a great deal more than they do now about the social and economic
      
      
   5. would have to know a great deal more than now about the social and economic
      
      
   
   答案是D 但是不懂为什么要加would啊？还有就是D和E相比，为什么选择有they do的呢  
   
   
   谢谢各位哈 ！麻烦了！
   
   
   
   To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.
   
   
   
   
   1. have to know a great deal more than now about the social and economic
      
      
   2. have to know a great deal more than they do now about the social and economical
      
      
   3. would have to know a great deal more than they do now about the social and economical
      
      
   4. would have to know a great deal more than they do now about the social and economic
      
      
   5. would have to know a great deal more than now about the social and economic
      
      
   
   答案是D 但是不懂为什么要加would啊？还有就是D和E相比，为什么选择有they do的呢  
   
   
   谢谢各位哈 ！麻烦了！