Cho 20,6 g hỗn hợp x gồm a mol fe vào dung dịch HCL thu được 11,2 l khí khí ở điều kiện tiêu chuẩn và 4 g chất không tan a tính phần trăm khối lượng kim loại trong hỗn hợp ban đầu B nếu cho 10,3 g x nung nóng rồi tác dụng hết với khí Clo tính thể tích Clo tối thiểu cần dùng
Bài 1: combine each pair of sentences into one . Use comma (,) if necessary.
1. The girl looked very upset. Her electronic dictionary broke down.
2. His grandfather had a great influence on his life. She was a hard-working woman.
3. Mai is interested in physics. I don't like it.
4. Tom has hundreds of books. They are all in foreign languages.
5. Shakespeare was a famous playwright. His birthplace was Stratford-upon-Avon.
6. I will always remember the teacher. He taught me how to read and write
Bài 2 : complete the sentences, using a relative pronoun
1. The pub is opposite the Town Hall. I first met my wife there.
2. He was sitting on a chair. It was uncomfortable.
3. He smokes cigarettes. They are very strong.
4. Let me see the pictures. You took them at Peter's wedding.
5. Some people only think about money. I don't like them.
6. Do you know that lady? I repaired her car.
7. That girl is Swedish. Tom is in love with her.
8. John has bought a house. There are ghosts in that house.
9. Some people drive drunk. I never travel with them.
10. A man stole £10,000 from a bank. The police have caught him.
Bài 1:Use who,which,that or whose to complete each of the sentences:
1, Vinh,.......... is only two and a half, likes to play games on a tablet.
2, My tablet,.........is two years old, still wroks quiet well.
3, Personal electronic devices.........distract students from their class wrok are banned in most school.
4, Students...........have smartphones can ues them to look up words in an electronic dictionary.
5, Some scientists think that children...........parents allow them to use electronic dictionary early will have more advantages in the future.
6, The loptop..........cover is decorated with funny animals belongs to my aunt.
7, People.........work involves using a computer for most of the day may sufer from headaches.
8, Mr Xuan Truong,.........was my first teacher, received and award for teaching excellence.
9, That's Peter,..........father has just come back from the Philippines.
10, That media player,.......... I often use to practise English, has some great apps.
11, Thể house,.........my father built is big.
12, Thể woman..........you have just spoken to is my favourite English teacher