1. (2015九上·启东开学考) 单词拼写。请根据括号中的中文提示或句意，写出句中所缺单词，使句子通顺。

1. （1） The boy often feels （孤独）when he stays at home alone.
3. （2） I hear you have been to Hong Kong, can you tell me your e there?
5. （3） He （意识到）he was wrong.
7. （4） We would take action to （减少） the pollution.
9. （5） The car rushed at high s.