Cho 16 gam hỗn hợp gồm 2 oxit CuO và Fe2O3 hoàn tan vừa đủ trong 500 ml dung dịch HCl 1M. a) Tính khối lượng mỗi oxit trong hỗn hợp. b) Tính thành phần % khối lượng mỗi oxit trong hỗn hợp.

V. Read the passage, and decide whether the following statements are true (T) or false (F) Dear Sarah, I hope you do not mind me writing to you. You probably do not remember me, but w met about three years ago. My sister Vtasta used to work as an au pair for the famil next door to you and I visited her for a week. We both went to a barbecue at you house. Your dad set fire to a tree in the back garden and had to call the fire brigade I'm sure you remember that. Anyway, I am writing to you now because Vtasta remembers that your parents ar both lawyers. I'm studying Law at university here in the Czech Republic. It's five-year course, and I^ prime m to finish my second year. I've decided to spend next yea working in the UK, partly to improve my English and partly to earn some money Could your mum or dad give me any advice about how to get a job in a law firm? I't prepared to do any kind of work. I'm enclosing a recent photo of me, Vtasta and two friends of ours. Vlasta is the gi with long, blond hair. I'm the one on the left, with short, dark hair and a long-sleeve T-shirt. Best wishes Marek Zeman 1. Marek and Sarah have never met face to face. 2. Vtasta used to work as an au pair for the family next door to Sarah's family. 3. Marek has nearly finished his university studies . 4. There are four people in the photo.

37.if you look hard enough, you ... it a.will find b.will bé finding c.are finding d.found

1. " I'm tired. I have a lot of my homework" =.> Nga told me ... 2. " I don't have much money. I have to work hard all time " => Nga told me ....

3. " Are you ready for the party, children?"

=> Mrs.Kim asked the children...