Lesson 119 A true storyvideo病原体侵入机体，消弱机体防御机能，破坏机体内环境的相对稳定性，且在一定部位生长繁殖，引起不同程度的病理生理过程Lets review.1. What_you_(do)whenI_(come)injustnow?2. I_(play)thepianowhilemum_(cook)thedinneryesterday.3. They_(have)apartyatthistimelastSunday.4. Whenshe_(clean)theroom,someoneopenedthedoor.5. WewerewatchingTVattenlastnight.( 改为一般疑问句）6. Amywaswritingaletterwhenthetelephonerang.( 对划线部分提问） weredoingcame wasplayingwascookingwerehaving wascleaningWereyouwatchingTVattenlastnight? WhatwasAmydoingwhenthetelephonerang?病
