Good one, but you might want to make them even catchier to the student's mind by explaining the analogies which most of them are based on. Thus, "on the fence" may be better driven home by imagining someone sitting on the fence, undecided as to which side of the fence to land. Same for "miss the bullet", suggesting the situation where you shoot a bullet but miss the target and fail. Cheers!
درود بر شما لطفا معنی اصطلاح را مانند قبل بنویسید. تا دوستان بتوانند بدون ویس هم بهره ببرند. چون در ایران یوتیوپ فیلتر و سرعت پایین است. ممنونم از شما.