the experiment they had devoted themselves to （be） turned out a failure? 要be 吗?
问题描述：
the experiment they had devoted themselves to （be） turned out a failure? 要be 吗?
答
不需要be
答
不对吧！！应该是：
The experiment they had devoted themselves turned out to be a failure .
答
不要.看断句：
the experiment / they had devoted themselves to / turned out a failure.