In the most common procedure for harvesting forage crops such as alfalfa,as much as 20percent 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.
D the most nutritious parts of the plant,shatters and falls
as much as .......后面怎么是修饰material?怎么用单数谓语动词呢
as much as 應是修飾 20 percent
那为什么主语不是leaf and material呢?
the leaf and small-stem material
是material做主语啊
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