international school;  good treatment;   achievements;   discussion;   population;    pollution

They were proud of their children’s ______________.
The ___________ was terrible because the shoe factory used to dump its waste into the river.
Would you like to study in that ____________ ?
We had a long ______________ about the question.
They went to a big hospital for  ___________.
B） 根据句子意思，用括号中所给单词的正确形式填空。
This is the _________ time for our school to hold the robot-making contest. (twelve)
Larry has put on too much weight because of his _________ diet. (health)
You can’t go on driving if you feel ___________(sleep).
Mark Twain was a ___________(humour) writer.
It’s __________(possible) for you to study English well if you don’t work hard.