题目如下： Airline passengers are expected to pick up and recheck all of their ____ befor e boarding their connecting flight. (A)suitcase (B)luggage (C)baggages (D)accommodation 答案是(B) 我选择(A) 解析说需要由意思来区分答案，D不会是答案，C我记得不可数，剩下两个选项我觉得都可 以，麻烦板上的大神们帮我解答为何不能是A，而答案是B 谢谢～～