It (be)five years since I (ride)a bike.
问题描述:
It (be)five years since I (ride)a bike.
答
它 (是) 我 (乘坐) 后五年一辆脚踏车
答
It has been five years since I rode a bike.
答
是填恰当形式吧.
It has been five years since I rode a bike.