one choice question

来源：百度知道编辑：UC知道时间：2024/06/30 12:27:18

they've been expecting a splendid crop. that's what they've been ______.
a.waiting b.waiting for c.waiting to d.waiting on
why?thank!

B
waiting for sth. ：等待某事（人，物）
其他三个答案没有这些用法

b.waiting for 现在完成进行时，他们一直在期待着的，相当于前文的they've been expecting

B. waiting for

waite for 固定搭配
本句后面省略了waiting for a splendid crop
如 we have to find a room to live in 一样，后面的介词是不能省略的