it's____to rain.let's get the work___before the rain comes.

问题描述:

it's____to rain.let's get the work___before the rain comes.
a
likely,done
b likely,to be finished
如果选a那么b为什么不行

选A,是因为get sth done是固定搭配,意为使某东西...从上面的句子来看,get the work finished 也行,但B答案中偏偏多了一个to be,当然不能选.