英语四六级小知识答:在make do, make believe, let drop, let fall, let fly, let slip, let drive, let go of, let there be, hear say, hear tell, leave go of等固定搭配中, 用不带to的动词不定式。 John let fly a torrent of abuse at me。 I've heard tell of him。 在动词help(或help +宾语)之后可用不...