I think of some problems that we have .the task on time

题目

I think of some problems that we have .the task on time
A.finishing.B.to finish.C.finished.D.finish.
解释为什么是a,b不可以吗

答案

关键在于你是否正确地划分了句子结构.
I think of +some problems that +we have to finish the task on time.楼主选A是这样划分的吧?这样划分读起来挺顺,不过结构其实有问题,“我考虑到一些问题,我们必须按时完成任务.”
正确划分应该是：I think of +some problems +（that we having）+finishing the task on time.
that we having 作为some problems 的修饰,而其实having 和finishing之间应该是省略了一个in,加上以后楼主就会更清楚明白了,这橘子的原意是“我考虑到一些我们要按时完成任务的话会遇到的问题.”