根据所给汉语，完成英语句子。每空填一词。

1. 我感觉很疲劳，可能是昨天晚上我熬夜太晚。

    I ___    _              very much. Maybe I stayed up too late last night.

2. 如果你对你的朋友更友好一点，他们就会帮助你了。

    If you were ___    _              to your friends, they would help you.

3. 我认为学习比玩电脑游戏重要得多。

    I think studying is ___    _              than playing computer games.

4. 你能想出解决这个问题的好办法吗？

    Can you ___    _              a good way to solve this problem?

5. 我在学校的考试中总是名列前茅。

    I always ___    _              in the school exams.

食物中加碘可预防什么疾病？