2. 外语
  3. No trees could be seen here five years ago, but now over 60% of this district covered by trees and greens.

No trees could be seen here five years ago, but now over 60% of this district covered by trees and greens.

admin2008-11-27  9
问题 No trees could be seen here five years ago, but now over 60% of this district covered by trees and greens.
选项 A、are
B、has
C、have
D、is
答案D
解析 百分数作主语时，若所修饰的词为单数可数名词或不可数名词，则谓语动词用单数。例如：Two thirds of the apple is water．这个苹果的三分之二是水分。此外，句中后半句为一般现在时，副词now为现在时的标志。
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浙江省大学英语三级

大学英语三级

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