选词填空 根据短文内容，从方框中选择恰当的单词完成句子并填写在答题卡对应的横线上。部分单词在填入前需进行词形转换,每个单词只能用一次,每空只能写一词。( 共5分)
problem   less   important   healthy   recycle
It is very    to deal with the rubbish in cities. This is because rubbish not only pollutes the environment but also does harm to people’s    . We are trying to find some ways of dealing with the rubbish. First, the rubbish can be divided into different kinds. Newspaper and glass can be    . Used tins can be made into beautiful handicrafts（手工艺品）. Polluted water is a big    . It must be dealt with properly before we let it flow into the river. Some harmful rubbish can be buried（埋）so that it will cause    pollution.