问题详情：
根据句意用所给词的适当形式填空。
1. I don’t know what made him laugh so_______(excite)?
2. Andy Law will give two______(perform) in Nanjing this year.
3. He made a ________(decide) not to go there this week.
4. Most international ________(busy) letters are written in English.
5. “We are proud of your_______(successful), Daniel.” said father.
【回答】
1. excitedly 2. performances 3. decision 4. business 5. success
知识点：构词法
题型：完成句子
