问题
t know the ____ income ofthe family, but I do know it is very small
A:ancient people were notfamiliar with the healing power of nature
B:modern people are notfamiliar with the healing power of nature
C:the healing power ofnature works better on children
D:give in
B:modern people are notfamiliar with the healing power of nature
C:the healing power ofnature works better on children
D:give in
正确答案是：
