北京2015
高考英语阅读理解、短文改错课外自练（9）答案（三月）
阅读下列材料，从每题所给的四个选项（a、b、c和d）中，选出最佳选项。
《科普知识型---阅读理解》
doctors sometimes prescribe light therapy to treat a form of depression in people who get too little morning sun. but too much light at other time may actually cause such mood disorders. long¬lasting
