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nhocthuydung1
2 năm trước
Hãy xác định CTHH của 1 oxit kim loại A có hóa trị III, biết rằng hòa tan hết 8g oxit này bằng 300ml dd H2SO4 1M. Sau phản ứng phải trung hòa lượng axit dư bằng 50g dung dịch NaOH 24%
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1. Generosity is a part of the Vietnamese ___________________. joke orphanage character straightness 2. She spent most of her free time _______________ volunteer work. do doing to do did 3. He has a good sense of ________________. He always makes people laugh. humor humorous joke joking 4. They _________________ from Canada to America to find work. came emigrated left arrived 5. The children are old enough to take care of _______________. himself herself ourselves themselves 6. The football match was _______________live all over the world. arranged assisted transmitted conducted 7. Modern life needs lots of __________________ devices. dangerous electrical unsafe useless 8. We _______________ to visit her hometown next week. were going will going are going went 9. Unlike Bao, Khai and Song are quite reserved __________ public. with by at in 10. Our principal is out at the moment. Would you like to leave her a __________________? precaution care message view giúp em với ạ

116. I really don’t think he has the ______________ to do this job. (able) 117. They work ______________ (good) 118. ______________ covers the sky at night. (dark) 119. Hard work always brings ______________ (succeed) 120. He was very ______________ He was a ______________ (patriotism) 121. ______________ methods of farming have helped to increase rice production a great deal. (science) 122. Mr Hung went ______________ last Sunday. (shop) 123. These abbreviations are ______________ used in writing letters. (common) 124. I would recommend that you should be interested in reading ______________ books and magazines. (education) 125. John is old enough to be ______________ of his parents. (depend) 126. It takes years of ______________ to acquire the skill of a ballet dancer. (practise) 127. These questions are ______________ John can ______________ answer them. (ease) 128. A spaceman must learn to become accustomed to ______________ in a spaceship. (weight) 129. Make sure that your time is spent ______________ . (use)

5. Good friendship should be based on ________ understanding . A. common B. shared C. social D. mutual 6. A person that you simply know but isn’t your close friend is a ( an ) ________. A. acquaintance B. good friend C. relative D. friendship 7. My mother gave me 17 ________ which are on the birthday cake, one is for each year. A. go B. presents C. candles D. flowers 8. The girl glanced at me and turned away. A. looked carefully B. looked quickly C. looked attentively D. looked suspiciously 9. There are many meaningful ________ in my country. A. celebrations B. celebrate C. celebrator D. celebrates 10. Ann hoped ________ to participate in an English speaking club. A. to choose B. choosing C. to be chosen D. being chosen 11. I’m sure he is incapable ________ running a mile in four minutes. A. on B. of C. about D. at 12. It’s impolite ________ people about their salary. A. asking B. to be asked C. to ask D. being asked 13. My parents always ________me to do morning exercises regularly. A. encouraged B. encourages C. encourage D. encouraging 14. Yesterday, I saw her ________ in the park, hand in hand with Jack. A. to walk B. walk C. walks D. walked 15. The fire took many things ________ me, but it gave me something, too. A. to B. at C. without D. from 16. By the time he ________twenty five, he ________a million pound. A. is_made B. was_made C. was_had made D. had been_made giúp em vs ạ em cảm ơn

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