互动封闭仿真课堂1、智能交互 2、电子板书式视频教学 3、5分钟一次互动问答 4、封闭课堂
81.The earth was once a beautiful planet where people lived happily ___ trees and animals. Now , the world is dark and dirty, with no room ___ happiness and fun.
A.among; for B.between, for C.between; of D.among; of
82.-Whose advice do you think I should take?
A.You speak B.That's it C.It's up to you D.You got it
83.Henry can't attend the party ____ at Tom's house at present because he is preparing for the speech at the party ____ at Marie's house tomorrow.
A.held; being held B.held; to be held
C.being held; to be held D.being held; held