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1.If you don't work hard, you won't pass the exam.
2.If Harry fails his examination, his parents will be sad.
3.If Sue goes out this weekend, she won't have time to study.
4.If it snows tomorrow, I will go skiing.
5.If engineers don't get enough sleep, they will make a series of mistakes.
6.If you aren't careful, you may fall off your horse.
7.If more people cycle every day, there will be less air pollution.
Cảm ơn bạn 
1. No, but I wish I could be good at it
2.My Math teacher was very kind and helpful. She always explained the lesson to us in detail, even though after she had explained everything, I still couldn't understand it :v
3. Countless: from calculating numbers, counting things to determining the coordinates,....
4. Yes, sometimes. I think I'm not very keen on calculating numbers. It's very confusing to me
5. Because Maths is something that exists everywhere around us! Like what, if you have a cake, and there are 4 people in your family, you can know how to divide the cake equally because you have learned about division. Maths appears almost anytime and anywhere in your daily life
1. I'm not good at math
2. my teacher is very good
3. I have learned a lot from math such as: how to calculate addition, subtraction, multiplication, division .....
4. I also find it a bit difficult.
5. Because when learning math, children will know how to calculate and can help their parents in calculation work
Put the word in its right form
1. Several toxic gases are very .harmful.. to our health. (harm)
2. This company offered a lot of .attractive.. jobs. (attract)
3. Minh looks .worried.. again. What's the matter with him? (worry)
4. We need to know your .weight.., Minh. (weigh)
5. Catching the common cold is .unpleasant.. for everybody. (please)
6. The roads are rough in .mountainous.. areas, so it's hard to travel by car. (mountain)
7. You should be .careful.. when driving. (care)
Viết lại câu
1. Could you tell me how to get to the City's Exhibition, please?
-> Could you show ....me how to ge to the City's Exhibition, please.....?
2. Do you find it easy to make friends ?
-> Are you good ...on terms with friends.... ?
3. I think you should prepare carefully for your journey.
-> I advise you to .....prepare carefully for your journey....... .
1.Could you show me how to get to the City's Ehibition,please?
2.Are you good at make friends?
3.I advise you to prepare carefullyfor your jouney.
1 Are you feeling hungry at the moment?
2 How much processed food does your family eat?
3 When should parents give chocolate to their children?
you should (learn)..........learn......... hard to please your parents
you should (learn) learn hard to please your parents