cấu số 17 cho hàm số y=x^3-3x^2 khẳng định nào sau đây đúng

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Ex3: Give the correct verb form: 1. If she ....................(work) hard, she .....................(pass) the exam. 2. If I ..................(come) soon, I ....................(phone) you. 3. She ...................(feel) sad if you ....................(not, give) her a gift. 4. If Peter ......................(go) to work late again, he .................(be) sacked. 5. If the boy ....................(eat) that apple, he ....................(be) ill. 6. If you .....................(not, hurry), you .....................(miss) the bus. 7. Tell him about this story if you .........................(see) him. 8. If you ..........................(have) a day off where you..............(go)? 9. If he ..................(cook) the meal himself, help him. Ex4: Write the conditional sentences from the following statements. 1. We will plant more trees. The air will be fresher. If __________________________________________________________ 2. We will use fewer cars. We will reduce pollution. If __________________________________________________________ 3. We will cycle to school every day. We will keep fitter. If __________________________________________________________ 4. We will use recycled products. We will save money. If __________________________________________________________ 5. People will throw rubbish into the right bin. They will keep the environment clean. If __________________________________________________________ 6. We will turn off the tap when brushing the teeth. We will save a lot of water. If __________________________________________________________ 7. People will travel more by public transport. The harmful gases in big cities will be reduced. If __________________________________________________________ 8. We will start at six. We will arrive there before noon. If __________________________________________________________ 9. The boy eats so may green apples. He will be ill. If __________________________________________________________ 10.We will use reusable bags for shopping. We will reduce waste If_________