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Cho 21,3 gam halogen X tác dụng hết với 11,2 gam Fe thu được m gam muối sắt (III) halogen nua. a. Tìm tên halogen X. b. Tính m.
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Ex 7. Circle the best answer A, B, C or D to complete the sentences: 1. My parents _______ me to see Ho Chi Minh’s Mausoleum last summer. A. led B. took C. brought D. directed 2. I’m sure they were _____ lies. A. telling B. making C. doing D. saying 3. My sister will be 16 ….. Sunday ………….. A. on - May 25th B. on - May 25 C. in - 25th May D. in - May 25 4. If he eats all that food, he eats ....................... A. quite much B. too many C. quite many D. too much 5. Mr.Robinson speaks Vietnamese very...................... A. skillfully B. good C. fluently D. best 6. The dress Hoa made didn't ............. her; it was too small. A. match B. suit C. go with D. fit 7. Don't forget ................ your teeth before going to bed. A. brushing B. to brush C. not to brush D. about brushing 8. Hoa tried ............... that new dress but it didn't fit. A. out B. at C. with D. on 9. The first things many people do when they want ............... weight is dramatically cut their calories. A. to gain B. to lose C. to cut D. to decrease 10. My Dad has a ............ summer vacation. a. A. three-weeks B. three-week's C. three weeks D. three-week Ex 8. Write the correct form of the words given in capital letters: 1. The most popular............................ at recess is talking. ACT 2. Hoa is having a ............................. check-up. MEDICINE 3. The nurse wanted to know Nga’s height and ................. WEIGH 4. Edison’s most famous............................was thethe electronic bulb. INVENT 5.This dictionary is very .................... for you to learn English. USE 6. We must remember to eat…………………………….. SENSE 7. then, Hoa …………………………….a pan and stir- fried the beef HOT 8. Mr. Hung has a very……………………tooth PAIN 9 .She spent her….........................…..in the country. CHILD 10. The president is going to make a ……............…tonight SPEAK Ex 9.Complete the following sentences with the correct form of the verb in the brackets . 1. You ( go )...............out last night? – Yes. I (go) ..............to the cinema but I (not enjoy)................. the movie very much. 2. It often ( take)................ me twenty minutes ( go ).................to school. How long it ( take ).................. you , Linh? 3. My sister ( go)............. ...... to the Youth club every weekend. She enjoys ( play )....................... sports very much. 4. Be quiet! I ( want ).......................... to hear the news. 5. My father ( play ) roller- skating when he ( be)............................. a child.

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