根据句意及汉语提示完成句子。

1. In the western countries, April 1st is _____ (愚人节).

2. — When will the _____ (化妆晚会)start?

    — At 8:00 pm.

3. He felt _____ (尴尬的) because of his stupid words.

4. Don't _____ (晚睡), or you can't get up early tomorrow morning.

5. Mother and father are both very _____ (疲惫不堪的) after a day's work.