单选题
We have come to realize the need to leave enough environmental space for our offspring.
A. contemporaries B. ancestors
C. descendants D. neighbors
【正确答案】
C
【答案解析】offspring：后代，子孙(不可数)；contemporary：当代的，当代人；ancestor：祖先； descendant：后裔，后人； neighbor：邻居，街坊