问题
填空题
根据句意及首字母，补全在本课中出现的单词。
1. Fast is the o_____ of slow.
2. You should study hard to i_____ your English.
3. Where is the k_____ to the door?
4. Please l_____ the door before you leave.
5. I hope you will have a good f_____.
答案
1. opposite 2. improve 3. key 4. lock 5. future