单词拼写

1. He was hurt badly yesterday, it may p____ him playing in today's game.

2. Laughter (笑) is the best _____(药).

3. Cigarette smoking causes death and d        .

4. —Can we come with you?

    —Oh, Is _____ so.

5. He was in poor health because of his poor _____ (饮食) and less exercise.