A dviver is asked to keep his safety belt __ while driving on the_英语解答

A dviver is asked to keep his safety belt __ while driving on the freeway
答案为fastened driving 求这个试题的考点.为什么是这个答案.

人气：295 ℃　时间：2020-05-24 10:07:05

解答

过去分词表形容词.keep sth adj保持某物如何如何,如keep your mouth open.