题目内容

A large number of students           planting trees now, the number of the students         2000.
A．is, isB．are, isC．is, areD．are, are
B
考察主谓一致。句意：许多学生正在植树。这些学生的数目是2000.结合语境可知前文a number of表示许多人，主语是复数，故系动词用are。下文the number of……的数目，主语是抽象名词，不可数，故系动词用is。选B。
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