城镇居民一般上班族家庭早餐是（）。
A、少而丰
B、正而丰
C、饱即宜
D、少而精
参考答案：D
风疹减毒活疫苗常与_________和__________减毒活疫苗联合免疫。
They have already been to the place ____ their ancestors lived .
A. which B. where C. when
