【题目】The number of the teachers who _________ cars _________ increasing.
A.own; are
B.own; is
C.owns; is
D.owns; are

【答案】B
【解析】考查主谓一致。句意：拥有汽车的老师的数量正在增加。分析句子成分who引导的从句是来修饰teachers的，所以从句谓语动词用复数，the number修饰名词时表示“……的数量”，谓语动词用is，故选B。