we have been looking for the boy all the morning but he is nowhere__

题目

we have been looking for the boy all the morning but he is nowhere__
a.to see b.seeing c.seen d.to be seen

答案

选择D（出自五高考三年模拟 专题6 动词的时态和语态）
Be to +动词原形 意思是 按计划或安排要做的事
还有8种意思
这是第6种 表示“可以,可能”相当于may ,can
eg：
The news is to be found in the evening paper.
She is nowhere to be found.在哪里也找不到她