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Giúp mk với ạ, giải thích từng câu nhé >3< E1: Khoanh đúng câu trả lời 1.I wish they..............us when they were in town. A.visit B.visited C.will visit D. had visited 2. If only I the trip to Hanoi with her next summer. A. will take B. takes C. could take D. took 3.My brother wishes he time when he was young. A. does not waste B. do not waste C. wasted D.had not wasted 4.A: I told your mother that you had left your job. B: Well, I wish you her. It's none of your business. A. wouldn't tell B. didn't tell C. hadn't told D. doesn’t tell 5.A: I wish you making that noise. It's bothering me. B: Sorry, I'll stop it right now. A. would stop B. are going to stop C. stop D. can stop 6.A: My feet are killing me! I wish I more comfortable shoes. B: Yeah, me too. I wish I that we were going to have to walk this much. A. had worn/ knew B. am wearing/ had known C. were wearing/ would know D. wore/ had known

Bài 7: Người ta kê một tấm ván để kéo một cái hòm khối lượng 60kg lên một chiếc xe tải. Sàn xe tải cao 0,8m so với mặt đường, tấm ván dài 2,5m, lực kéo bằng 300N a) Tính lực ma sát giữa đáy hòm và mặt ván. b) Tính hiệu suất của MPN này Bài 8: Một máy kéo có công suất 40kW a) Con số đó cho ta biết điều gì? b) Tính công của máy sinh ra trong 4 giờ. c) Tính lực kéo của máy Biết trong thời gian đó xe chuyển động đều và quãng đường xe đi được là 200km. Bài 9: Một máy hoạt động với công suất 1,2kW để nâng một vật lên cao 10m. Hỏi thời gian để nâng vật lên là bao nhiêu? Biết vật có khối lượng 90kg, hiệu suất của máy là 75%

III.  Correct the sentences if necessary. Check (√) s any that are already correct: 1.The Chinese has an interesting history. 2.English is one of the most popular language in the world. 3.The scissors on the table is my sister’s. 4.Linguistics is my major field of study. 5.There are good furniture in this showroom. 6.The cattle is grazing in the meadow. 7.The interrogation, conducted by the police officers, have lasted for several hours. 8.The tenants in the apartment next to mine is giving a party this evening. 9.The president, surrounded by secret service agents, is trying to make his way to the podium. 10.The buildings destroyed during the fire are being rebuilt at the taxpayers’ expense. 11.20 percent of the forest have been destroyed lately. 12.The witnesses saw that most of the fire in the hills was extinguished. 13.Some of the animals from the zoo was released into the animals preserve. 14.All of the students in the class taught by .Professor Roberts is required to turn in their term papers next Monday. 15.Half of the food that we are serving to the guests are still in the refrigerator. 16.We believe that some of the employees is going to be devoted to quality control. 17.It is impossible to believe that somebody actually admire that man. 18 Each of the doctors in the building needs to have a separate reception area. 19.The president felt that no one were better suited for the position of chief staff advisor. 20.Everybody participating in the fund-raiser are to turn in the tickets by 8. 00. IV  Complete the sentences with is / are, has / have or dose /do. 1.Either John or you ………. . to be responsible for the unfinished work. 2.David, as well as his friends, …………collecting waste paper to recycle. 3.John and Helen ……. . not admit to have broken the window. 4.Neither Tom nor his friends………. . lost the keys. 5.Both Peter and his girlfriend………. working for a bank. 6.Neither the library nor the bookstore…………the book I need. 7.Tom as well as his two close friends ………not in class today. 8.Both Ron and Bob ………passed the exam successfully. 9.One of the staffs………. to report the problem to the manager. 10.Either the girl or her parents…………going to be present at the party.

Cho P= $\frac{-2x}{1+x}$ tính GTLN của P

giúp mình với nha các bn mìn cần gấp

Look! The cheeses on the table in very tasty. Find the mistake Nhớ GT

We started working here three year ago A. We worked here for three year B. We have no longer worked here for three years C. We have worked here for three years D. We will work here in three years

mình cần gấp giúp mình bài 1 phần B unit7 sách tập hai lớp 6 nha

đoạn văn 2/3 trang giấy thi về 2 chữ " cảm ơn "