问题补充：
单选题IstudyinHighSchoolAffiliatedtoSouthwestUniversity.Thereare__________studentsinourschool.Nine______________ofthemaregirls.A.thousands of; hundredB.thousand of; hundredsC.thousand of; hundredD.thousands of; hundreds
答案：
A解析此题考查名词的量。确切数量常用数词+hundred/thousand/million/billion+名词的复数形式；不确切数量常用hundreds/thousands/millions/billions + of+名词的复数形式.
