1. Peter is ________ student in my class. A. taller than B. so tall as C. the tallest D. tallest 2. Jane is not ________ as her brother. A. more intelligent B. so intelligent C. intelligenter D. intelligent 3. Can Tho is ________ from Sai Gon than Bien Hoa is. A. farther B. further C. far D. farer 4. Bao Yen sings ________ than this singer. A. well B. better C. gooder D. weller 5. The ________ we start, the sooner we will be back. A. early B. earliest C. earlier D. early 6. The harder this student works, ________ he becomes. A. the most understanding B. the more understanding C. more understanding D. understandinger 7. My father is ________ as yours. A. old B. as old C. older D. so old 8. HCM city is ________ than Hanoi. A. large B. largest C. more large D. larger 9. She is the ________ daughter in her family. A. older B. more old C. eldest D. oldest 10. She speaks English as ________ as you. A. clear B. clearly C. clearness D. clearer 11. The ________ he is, the more miserable he gets. A. richer B. more rich C. rich D. the richer 12. He drives as ________ his father does. A. careful as B. more carefully C. the most careful D. carefully as 13. I’ll be there ________ I can. A. sooner as B. no sooner as C. as soon as D. soonest as 14. Of the two sisters, Linda is ________. A. beautiful B. more beautiful C. the most beautiful D. so beautiful as 15. ________ I get to know her, the more I like her. A. For more B. More C. The more D. The most 16. In stead of slowing down, he drove ________. A. more fastly B. faster C. more faster D. faster more 17. Hotels have developed ________ restaurants. A. as rapidly as B. so rapidly that C. as rapid as D. as rapid than 18. Commercial centres are ________ they were many years ago. A. as popular than B. more popular than C. the most popular D. most popular than 19. What’s the ________ film you have ever seen? A. good B. better C. best D. the better 20. The ________ accident in the history of the city happened last night. A. badest B. most bad C. worse D. worst 21. He finished the test ________ of all. A. rapidly B. more rapidly C. the most rapidly D. rapid 22. This is ________ man of all I’ve known. A. best B. better C. good D. the best 23. The man bought ________ books that he needed assistance to carry them. A. such many B. too many C. so much D. so many 24. He ________ to be offered that job. A. was such inexperienced B. was not experienced enough C. was too inexperienced D. both B and C 25. He ________ I was scared. A. drove too fast that B. drove so fastly that C. drove so fast that D. drove such fast that 26. ________ the man gets, ________ he becomes. A. The more old/ the more weak B. The older/ the weaker C. The older/ the weakesD. older/ weaker 27. I did ________ than I expected on the test, but not really badly. A. worst B. the worst C. more bad D. worse 28. I can’t stand this weather. It’s getting ________. A. badder and badder B. worse and worse C. worst and worst D.more and more worse 29. Health care in the country is said to become ________. A. good and good B. best and best C. the better and the better D. better and better 30. ________ people use the internet every day. A. Many and many B. Most and most C. More and more D. The more

Để giải câu hỏi về phần trăm khối lượng của KCl trong loại phân kali được sản xuất từ quặng xinvinit có độ dinh dưỡng 55%, ta có thể áp dụng phương pháp tính toán hóa học như sau:

Giả sử khối lượng ban đầu của quặng xinvinit là 100g. Do quặng có độ dinh dưỡng là 55%, tức là trong 100g quặng xinvinit, có 55g KCl.

Do đó, phần trăm khối lượng của KCl trong loại phân kali là: (55g) / (100g) * 100% = 55%

Vậy, câu trả lời chính xác cho câu hỏi trên là: B. 55%