问题补充:
A number of students reading in the classroom now.
A. is
B. was
C. are
D. were
答案:
A. is
B. was
(答案→)C. are
D. were
解析:C 考查a number of和the number of的区别,前者意为“许多”,与many等同;后者意为“......的数量”,谓语用单数。“现在有很多学生在教室里读书。”故选C。
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