1. on the lake 2. under the big tree 3. behind the big tree 4. in the classroom 5. at home 6. by train
7. on a cold winter evening 8. on Wednesday morning 9. at night 10. in the afternoon
答案不唯一
1. on the lake 2. under the big tree 3. behind the big tree 4. in the classroom 5. at home 6. by train
7. on a cold winter evening 8. on Wednesday morning 9. at night 10. in the afternoon
答案不唯一