這里為什么用完成時(shí)？

Perhaps, there is an element of truth in both these pictures, but few of us have had the opportunity to find out.
    新概念3-12: Perhaps, there is an element of truth in both these pictures, but few of us have had the opportunity to find out.
    為什么是"have had the opportunity "？
    自己寫(xiě)的話(huà),肯定是few of us have the opportunity to find out
    Perhaps, there is an element of truth in both these pictures, but few of us have had the opportunity to find out.
    用完成時(shí)表示,到現(xiàn)在為止還沒(méi)有機(jī)會(huì)。可以體會(huì)到說(shuō)話(huà)的人已經(jīng)有過(guò)試著去發(fā)現(xiàn)的動(dòng)作了,或者一直有人在嘗試,只是還沒(méi)有人成功。
    用一般時(shí)表示說(shuō)話(huà)人的一種判斷,主觀地認(rèn)為不會(huì)有機(jī)會(huì)發(fā)現(xiàn)事實(shí)。