2. 职称英语
  3. Various means of transportations (establish)______in this city so far.have been

Various means of transportations (establish)______in this city so far.have been

游客2023-10-04  12
问题 Various means of transportations (establish)______in this city so far.
选项
答案 have been established
解析 首先根据时间状语so far“到目前为止”判定用现在完成时。又由于transportation与establish之间存在被动关系，所以要用被动语态。本题中主语means意为“方式，方法”，由various可知指多种方式，这里是复数的概念，因此助动词要用复数形式have。综上所述，此处填入have been established。
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