– A number of students in the dinning hall.
-- Let me count. The number of the students about 400.
A. are, is
B. is, are
C. are, are
D. is, is
网友回答
(答案→)A. are, is
B. is, are
C. are, are
D. is, is
解析：A number of一些，许多；The number of……的数目。句意：许多学生在大厅里面。——让我数一数。这些学生的数目是大约四百人。结合语境可知上文主语为复数名词students，故系动词用复数形式。下文主语为抽象名词number，不可数，故系动词用单数，选A。