He is addicted to ___, which ___ cocaine to reach the brain quickly.A. smoke, allows B. smoking, lets C. smoke, takes D. smoking, allows疑问1. 第二个空:let 后,不是应该接不带to的不定式吗?可是答案给的是B2. 为什么allow不可以?非常紧急,请大家帮帮忙,谢谢啦O(∩_∩)O~