问题
填空题
用适当的介词填空。
1. They are staying there _____ three weeks.
2. She is leaving _____ June 15th.
3. What are they doing _____ vacation?
4. Alice is going camping _____ her classmates.
5. They are buy working now. How _____ you?
答案
1. for 2. on 3. for 4. with 5. about