一、单词拼写（每空一个单词1分，共10分）
2. He________________(后悔) that he had missed the lecture by Professor Smith.
3. Great changes have taken place in our school in the past two d______________.
4. Water ______________ （扩大)when it freezes.
5. India ________________ (出口) tea and cotton to many different countries.
6. Swimming helps to get the blood __________(循环) through the muscles.
7．We should care for the young and r________________ the elderly.
