She heard planes ___________ overhead.
问题描述：
She heard planes ___________ overhead.
A.pass B.to pass C.to passing D.in passing
答
c肯定先排除啊,哪有to doing,不定式后怎么可以跟ing呢,D也不对,heard后没有in的短语,A和B呢,to do不定式有表示将来的含义在里面,听见飞机飞过头顶一定是进行的啦,那就只有选A啦,这是感观动词的固定用法,记得吗,see sb do sth.hear sb do sth.