根据首字母及汉语释义填写单词。
1. It will be rainy, you'd better take an u_______ (雨伞) with you.
2. Our teacher is still c_______ (检查) our homework.
3. Many p_______(乘客) got hurt in this accident.
4. You are so funny! I can't stop l _______ (笑).
5. My c_______ (化学) teacher's lesson is so interesting that all of us like it.