问题
选择题
The number of teachers in our college _____ greatly increased this term. A number of teachers in this school _____ from the countryside.
A．is; is
B．is; are
C．are; are
D．are; is
答案
答案：B
the number of“的数量”，作主语时，谓语动词常用单数，而“a number of+复数名词”意思是“大量的；许多”，作主语时，谓语动词用复数形式。