76.答案是ten.选项给错了吧.文中第一句:One day Mr Brown sees a woman in the street with ten children.
77.B 第一段结尾:white caps,blue coat,and black trousers 顺序换了换而已.
78.B 第一段第二句话开头:He is very surprised because ...
79.A 最后一段第二排中间:It is easy to see our children when they are among other children
80.答案是easy 最后一段最后一句话:When there are other children among ours,it is easy to see them
PS:信息全在文中.