题目内容：

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Until recently, almost everyone thought that growth and progress would make the world a 1.______ (good) place. They believed that something new was always better than something old. So countries have spent millions of dollars 2._______ science to develop new ways of making things and doing work. 3._____, this new technique is the main cause of the world’s problems. One such problem has come from the 4.________ (appear) of the car. In some 5.______ (crowd) cities, the car has polluted the air 6._______ badly that people get sick just from breathing it. Waste from factories is another example of how new technology is hurting the earth. When some waste chemicals 7.________ (put) into the sea, they can hurt or kill animals and fish. It’s time that we 8._______ (do) something as soon as possible. When the problems get worse, they will not affect just a few 9.________ (country). They will be world problems 10.____ affect us all.