Dựa vào những từ cho sẵn, viết thành câu hoàn chỉnh.
1. We/ have/ breakfast/ when/ the mailman/ arrive.
2. While/ everyone/ sleep/ Paul/ watch/ TV.
3. I/ dream/ about/ long/ vacation/ when/ the alarm/ clock/ go/ off.
4. While/ I/ practice/ the piano/ late/ last night,i/ hear/ strange/ noise.
5. The sheep/ graze/ in/ the/ filed/ when/ they/ be/ scared/ by/ the/ noise.