Question

A number of students _______ reading in the classroom now.

A．is

B．was

C．are

D．were

Answer 1

C

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。