Yesterday l( )a letter to kate括号里填什么

what are you doing?l()a lett to my pen pal还有考的知识点 1.A friend is now repairing the piano in the workshop.2.They are building a new bridge over the river.3.The postman delivered a newspaper this morning.4.My mother gave me a present yesterday.5.The police have arrested the thief.6.He was typing a lett l had a chat with my driebd yesterday否定句 l ate a hamburger yesterday evening.改为疑问句 l went to a park wath my family yesterday问句 l took a photo yesterday.改为复数句 连词成句 friend,a,visited,l.yesterday,morning l went at a park yesterday 这句话的错误 Yesterday l( )a letter to kate括号里填什么 boat a l yesterday rowed连词成句 appl.phys.lett. appl.phys.lett.是什么? l got_______________school late yesterday. l v( )Beijing yesterday Because l was ill yesterday () l stayed at home.A.so B./ C.for D.but l ate（）vegetable than l had yesterday A.much B.many C.more D.most Kramer,S.A.,etal.,Appl.Phys.Lett.,1955;53:155 各对应的Sample TextSample TextSample TextSample TextSample Text 如何查找文献,比如M.A.Khan,et al.,Appl.Phys.Lett.,vol.68 (4),pp.514-516