it remains________whether the patient can survive the major operation or not.a.to observe b.be...
问题描述：
it remains________whether the patient can survive the major operation or not.a.to observe b.be...
it remains________whether the patient can survive the major operation or not.a.to observe b.being observed c.observeing d.to be observed 选什么?为什么?要详解谢谢
答
to be observed it是形式主语,后面的从句是主语从句,表示这件事要被观察.所以选被动.