매일 3분 수능기출문제로 내신어법 정복하기 Day15

1. 다음 글의 밑줄 친 부분 중, 어법상 틀린 것은?

[10월] Persistent and prolonged feelings of sadness lacking any particular cause are often a sign of clinical depression, ①which requires treatment. People who are clinically depressed often feel hopeless and worthless.

Try as they might, they find it ②difficult to control their negative thoughts. *Insomnia or the tendency to sleep too much can be ③other symptoms of depression.

So, too, can the inability to concentrate or stay focused on a task. Probably the most im...