-Mr. Harry, we want to hear what you think about the reform being carried out in our school.-OK, I ___ to that.
Einstein got __letters from the people all over the word.
oh, Mary , there is only one apple left.Let me cut it ___ halves.
We must show concern ___ each other.
---Peter, you set down the result of the experiment, ___________? ---Oh, yes, but I need to find my pen first.
Rio De Janeiro, ___________the right to host the 2016 Olympic Games, will be occupied in building stadiums.