题目

About ______________ of the students in that village go on a rope way to cross the river to school. A . two fifth B . two fifths C . second five D . second fives 答案：B下列各项中，与青蛙适应陆地生活无关的是 （ ）A.头部感觉器官发达B.能利用肺进行气体交换C.趾间有蹼，适于划水D.后肢发达，适于跳跃