When my grandparents () young,there () not so many people here.A.are;are B.were;are C.are;were D.were;were
问题描述：
When my grandparents () young,there () not so many people here.
A.are;are B.were;are C.are;were D.were;were
答
When my grandparents were young,there were not so many people here. （B）
答
D.were;were
都是过去时。
答
D.were;were
我的父母已经不年轻了,要用过去时,过去没有那么多人,第二个也要用过去时