để hoàn thành một công việc theo dự định thì cần một số công nhân làm trong một số ngày nhất định . Nếu tăng thêm 10 công nhân thì công việc hoàn thành sớm 2 ngày . Nếu bớt 10 công nhân thì phải mất thêm 3 ngày nữa mới hoàn thành công việc . Hỏi theo dự định thì cần bao nhiêu công nhân và làm trong bao nhiêu ngày

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Question IV.Write a conditional sentence type 2 for each situation, as in the example. EG : 1.People throw rubbish in the street.The street doesn’t look attractive. If people didn’t throw rubbish in the street, it would look attractive. 2.There are so many billboards in our city. People can not enjoy the view. If …………………………………………………………………………………………………. 3.There is so much light in the city at night.Wecan not see the stars clearly. If ………………………………………………………………………………………………… 4.We turn on the heater all the time. We have to pay three million dong for electricity a month. If ………………………………………………………………………………………………… 5.The karaoke bar makes so much noise almost every night. The residents complain to its owner. If ………………………………………………………………………………………………… 6.She has a headache after work every day.She works in a noisy office. If …………………………………………………………………………………………………. Question VI. Rewrite the sentences below without changing their original meaning. 1. Radioactive pollution is very dangerous. It can cause abnormal growth. [since] 2. Leaves are damaged. The tree cannot get enough food energy to stay healthy. [because] 3. I don’t have much money now, but I want to buy a house in PhuCuong. If 4. Light pollution happens. There is a change in animals’ living patterns. If