求助 XDF p14. 7

bosniabosnia

In the most common procedures for harvesting forage crops such as alfalfa, as much as 20 percent of the leaf and small-stem material,which is the most nutritious of all the parts of the plant,shattered and fell to the ground .

(A) which is the most nutritious of all the parts of the plant,shattered and fell

(B)the most nutritious of all parts of the plants,shatter and fall

(C)the parts of the plant which were most nutritious will shatter and fall

(D)the most nutritious parts of the plant,shatters and falls

(E)parts of the plant which are the most nutritious have shattered and fallen

 答案(D) 为什么D选项动词可以用单数呢

[此贴子已经被作者于2007-7-4 15:21:20编辑过]

stevegt

因为前面用了as much as 20% of the leaf and small stem material 说明了作者把leaf 和small stem material 看成一个不可数的整体

bosniabosnia

谢stevegt

selenaly

有百分比或分数出现的时候其主语是of后面的中心词，在这里是material,所以后面的动词使用单数形式。