Giúp mình với nha 5* cảm ơn đầy đủ

1/ Công thức tính phần trăm theo khối lượng trong hỗn hợp là gì ? Trong Đó ? 2/ Công thức Tính khối lượng chất rắn là gì ? Trong Đó ?

Đầu bài là chuyển thành câu bị động

giúp em với mn k nghỉ dịch lú luôn rồi

Giúp em bài này ạ !! Cảm ơn các anh chị nhiều

Cho x+y=6, x.y=4 tinh (x+1)(y+1)

1. We …… on the lake when it started to rain so we went home. A. finished B. finishing C. were finishing D. are finishing 2. My dad found some money while he …… his suitcase. A. packing B. package C. are packing D. was packing 3. My brother ……… in Ireland when he met his girlfriend. A. study B. was studying C. were study D. was study 4. My grandma tried pizza for the first time while she ………. in Italy. A. staying B. is staying C. is stayed D. was staying 5. My mom ………. in the sea when she saw a dolphin. A. was swimming B. was swiming C. were swimming D. were swiming 6. ……. it ……. when you woke up this morning? A. Is….raining B. was ….. raining C. is….rain D.were…… raining 7. What …….. when the teacher came? A. were you doing B. was you doing C. are you doing D. are you doing 8. What did you watch on TV while you …….. dinner yesterday? A. were having B. was having C. were haveing D. was haveing 9. The man ………. his letter in the post office at that time. A. is sending B. was sending C. sending D. was senting 10. It ………and cloudy when we left Ireland. A. was rain B. was raining C. is raining D. raining

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