两个英语语法填空.
问题描述：
两个英语语法填空.
It is estimated that 60% of all journeys used to be _______ a bicycle and crowds of cyclists thronged the main roads.Today,although the proportion of people _____ cycle is still quite large especially in comparison.怎么填阿.为什么
答
第一个填on,be on a bicycle意思是用单车旅游的人；
第二个填riding,the proportion of people riding cycle 意思是骑单车的人数.