I can still remember that it is since the 1990’s, _____ we began to use cell phones,_______ the number of mobile users has greatly increased.
-What lifebe like without cell phones? -I cannot imagine it!
There is often disagreement on ____ is the better student. James or Celina?
____out how to put our furniture or we'll have to wait for another week to move in .
In his youth, Ma Yun finally attended Hangzhou Teacher's Institutehe failed the entrance exam twice
____carefully for a long time, the opening was a great success