—I wonder why the thinnest plastics bags, though ________ , are still in use her

题型：不详难度：来源：

—I wonder why the thinnest plastics bags, though ________ , are still in use here.
—Well, it’s no easy job to solve this problem effectively.

A．banning

B．banned

C．to ban

D．having banned

答案

B

解析

考查状语从句的省略。句意：我想知道为什么最薄的塑料袋，尽管被禁止了在这里仍然在使用中。好吧，有效的解决这个问题不是一件容易的工作。根据语境尽管被禁止，应用过去分词banned，though banned，中间省略了they are，所以选B。