don't know whether you happen_____,but i am going to study in u.s.a this September
为什么选to hear 不选 to be heard 或者to have heard
don't know whether you happen_____,but i am going to study in u.s.a this September 这是道高考题，做过的请回答。干嘛我提问的英语问题总是没人能回答？风中冷月，为什么不用to have done 碰巧你已经听到了 不是更好？令hear 是及物动词吗？是为什么不能用被动。