题目内容

18、Whoever leaves the lab last, _____ all the lights are turned off.

  A. make sure             B. make sure of             C. be sure                     D. be sure of

试题答案

18、A

相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网