根据句意及汉语提示填空。
1. I can lend you some _____ (磁带) of her songs.
2. I have many musical instruments. I can play the _____ (小提琴).
3. I called you yesterday evening. _____ (没有人) answered.
4. I'm not sure _____ (是否) he will come or not tomorrow.
5. He is very funny and often makes us _____ (笑).