根据每个句子中所给的汉语意思，写出单词的正确形式。每空一词。
1. I did rather _______ (差) in the race.
2. What are you going to do in your _______ (两个月的) holiday?
3. The farmers are both busy _______ (种) vegetables now.
4. He must be ______ (阻止) from crossing the street when the lights are red.
5. Why do you _______ (不喜欢) travelling by air?
6. Lily felt sad because her bird was _______ (死了).
7. By the end of the _______ (二十) century, the world population had passed six billion,.
8. At the _______ (医务室), Kate was looked over carefully by Mr.Brown.
9. Please give us a short talk in English. Nothing _______ (难).
10. He put his other shoe under his bed very _______ (轻轻地).