It______five years since he has left for Beijing.
问题描述:
It______five years since he has left for Beijing.
答
It___has been___five years since he has left for Beijing.
从他离开去北京已经有5年了。
答
口语用is
书面语用has been
都对!
答
has been
答
It_has been_____five years since he has left for Beijing.