tom! you must ----your things, A;take, B; to take C;taking D;takes,那个?

问题描述:

tom! you must ----your things, A;take, B; to take C;taking D;takes,那个?

A
must 后面跟原型
所有情态动词都是这样
但是情态动词过后表示过去就用
情态动词 + have + 过去分词