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2 năm trước
Cho `xyz = 1` Tính `A = x/(xy + x + 1) + y/(yz + y + 1) + z/(xz + z + 1)`
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1/ this is eraser .... ..and that is .. book a. an/ an          b. a/ an c. a/ a               d. an/ a 2/ do you like watching or.....games a. Watch        b. Playing C.watches      d. to watch  3/ phong usually has a picnic .....the weekend a. In           b. At C.for           d.on 4/ she has math .......ten to a quarter to eleven a. At                    b. In  C. From              d.on 5/ what is there . . ....drink? There's some juice on the chair A. For               b.  In  C. To                 d .with 6/ Tom: is this your watch ? Linda : ................ A. Im sorry . Im late B.it's 3 o'lock  C. yes .I'm fine D. No,it's .Lee's 7/ my parents ....... late for work A. Dont                b. isnt  C. Doesnt            d.arent 8/ Im very tired .  ..................sit down ? a. it"s ok         b. Why dont you C. Oh, yes       d.No, thanks 9/ ............does she go jogging? She often goes three time a week a.how                 b. Who C.how often       d.where 10/ marry : would you like some tea  Tom :   .............. a.it's my favourite b. No , it's tall C. Yes , it is  D. Yes , please 11/ my brother ..........eats beef.SHE doesnt like beef A. usually         b. Always C.never              d often 12/ i like computer.that's why i like ....... a. English            b. PE c. Math                 d.IT 13/ he goes jogging .........a week.on friday and sunday A.two                 b. Twice  C. First               d.once 14/ they like ..........in the mountains A.walking         b. Jog C.sail                 d. Swim 15/ she often listen to music in her .......... A. Time          b. Free time C.pastime      d. Weekend 16/ what's the .. ....like in vietnam ? It's hot  A.spring          b. Autumn C.season         d.weather 17/ fruits and vegetables are good for. .   . A.healthily         b. Healthy C. Health            d.unhealthy 18/ there are many good restaurant on the ........ A. street           b.town C. City              d  neighborhood Giúp tớ giải đúng, 5 sao hay nhất

1/ this is eraser .... ..and that is .. book a. an/ an          b. a/ an c. a/ a               d. an/ a 2/ do you like watching or.....games a. Watch        b. Playing C.watches      d. to watch  3/ phong usually has a picnic .....the weekend a. In           b. At C.for           d.on 4/ she has math .......ten to a quarter to eleven a. At                    b. In  C. From              d.on 5/ what is there . . ....drink? There's some juice on the chair A. For               b.  In  C. To                 d .with 6/ Tom: is this your watch ? Linda : ................ A. Im sorry . Im late B.it's 3 o'lock  C. yes .I'm fine D. No,it's .Lee's 7/ my parents ....... late for work A. Dont                b. isnt  C. Doesnt            d.arent 8/ Im very tired .  ..................sit down ? a. it"s ok         b. Why dont you C. Oh, yes       d.No, thanks 9/ ............does she go jogging? She often goes three time a week a.how                 b. Who C.how often       d.where 10/ marry : would you like some tea  Tom :   .............. a.it's my favourite b. No , it's tall C. Yes , it is  D. Yes , please 11/ my brother ..........eats beef.SHE doesnt like beef A. usually         b. Always C.never              d often 12/ i like computer.that's why i like ....... a. English            b. PE c. Math                 d.IT 13/ he goes jogging .........a week.on friday and sunday A.two                 b. Twice  C. First               d.once 14/ they like ..........in the mountains A.walking         b. Jog C.sail                 d. Swim 15/ she often listen to music in her .......... A. Time          b. Free time C.pastime      d. Weekend 16/ what's the .. ....like in vietnam ? It's hot  A.spring          b. Autumn C.season         d.weather 17/ fruits and vegetables are good for. .   . A.healthily         b. Healthy C. Health            d.unhealthy 18/ there are many good restaurant on the ........ A. street           b.town C. City              d  neighborhood Giải chính xác , 5 sao hay nhất

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