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2 năm trước
Để hút nước ở một cái hồ phải dùng 6 máy bơm làm việc liên tục trong 12 giờ.nếu muốn hoàn thành công việc sớm hơn 3 giờ thì phải dùng bao nhiêu máy bơm như thế?(công suất các máy bơm như nhau)
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5.We often organise concerts to ___________ funds for poor children. A. donate B. raise C. volunteer D. grow 6.I have to prepare some English lessons ___________ the orphans in the village. A. to learn B. to finish C. to teach D. to send 7.The ___________ are people who don’t have their own houses to live in. A. young children B. street children C. rich children D. weak children 8.We usually collect ___________ and food to provide to the homeless. A. old clothes B. garbage C. rubbish D. cans 9.They ___________ to that village to do volunteer work several times. A. went B. go C. going D. have gone 10.My brother and I ___________ Da Lat recently. A. visited B. will visit C. has visited D. have visited 11.My friends and I sometimes ___________ blood to cure patients in hospitals. A. bring B. donate C. take D. make 12.We ought to ___________ the volunteer activities because we can help a lot of poor people. A. make B. take in C. participate in D. bring 13.Many people donate to the Red Cross, a ___________ organization that aids people free of charge. A. profit-making B. for-profit C. non-profit D. profitable 14.___________ people usually live on the streets, under bridges, or in camps. A. Sick B. Homeless C. Elderly D. DisabledImmersive Reader

I. Pronunciation: 1. a. country b. why c. shy d. fly 2. a. window b. flow c. show d. how 3. a. stop b. shop c. movie d. hot 4. a. seven b. lesson c. tell d. begin 5. a. but b. cut c. shut d. put II. Put the words in the right order. 1. is/ telephone/ what/ number/ your? ................................................................................ 2. speak/ can/ I/ Phuong/ to? ……………………………………………………………. 3. free/ will/ you/ tomorrow/be? …………………………………………………………. 4. we/ in/front/will/ meet/ the/ of/ schoolgate. ………………………………………………………………………………… 5. Huong/ be/, /November 20th/ twelve/ on / will/ Saturday. ………………………………………………………………………………… III. Write the questions to which the underlined words are the answers: 1. I started to learn English 6 months ago. ………………………………………………………………………………… 2. This bridge is 5 meters long ………………………………………………………………………………… 3. She felt tired. ………………………………………………………………………………… 4. My mother goes shopping once a month ………………………………………………………………………………… 5. He was absent from school because he felt sick ………………………………………………………………………………… 6. Mr. Pike enjoys travelling …………………………………………………………………………………

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