婴儿开始添加含铁丰富辅食的时间是（）。
A.1个月内
B.2～3个月内
C.4～6个月内
D.7～9个月内
E.10～12个月内
参考答案：C
The house rent is expensive. I've got about half the space I had at home and I'm paying here.[ ]
A. as three times much
B. as much three times
C. much as three times
D. three times as much
