题目

The number of the people who _______ cars _______ increasing. A. owns; are B. owns; is C. own; is D. own; are 答案：C 解析: 本句话的定语从句是who own cars. 其先行词是people,因此,定语从句的谓语动词要用复数的own。本句话主句的主语是The number of指“…..的数目”，是单数概念。因此，主句的谓语动词要用is。Making friends is not easy. Sometimes it can take years______you become true friends with someone.A.beforeB.afterC.becauseD.Unless