Cho tam giac ABC, đường cao CE.

a) Tính AB biết BC=24cm, BE=9cm.

b) Kẻ AD vuông góc với BC, H là trực tâm của tam giác ABC. Chứng minh CD^2=DH.BA

I. Rewrite the sentences using both...and,nether...nor,either..or,not only...but also.

1. Karen will pick you up from the station or else Miles will.

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2. John hasn't been to Germany and his brother hasn't either.

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3. Jo and Jim speak French.

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4. Paul doesn't like going to the cinema. Tim doesn't either.

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5. James likes going fishing, so does Kate.

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6. This winter Liz is going skiing, so are her parents.

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7.Tim will fix your car or else John will

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8. Pete and Nicki prepared the dinner.

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9. Jane is going on a picnic this Sunday and so are her schoolmates.

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II. Complete the sentences using the words in bold. Use two to five words.

1. Danny can speak Chinese aand so can his brother. ( But )

- Not.....................................................brother can speak Chinese.

2. Gordon is a journalist: his wife is too. ( are )

- Both....................................................journalists.

3. The exihibition will be opened by tthe mayormor the Queen. ( or )

- Either the............................................opened the exhibition.

4.Not only Patricia but also her husband want to emigrate. ( and )

-Both...............................................................to emigrate.

5. She doesn't enjoy sleeping in a tent and nor does her sister.( nor )

- Neither......................................................................sleeping in a tent.

6. Bob is about to leave; Helen is about to leave too. ( also )

- Not only........................................................about to leave.

7. My father didn't go to university and neither did my mother.( Nor )

-Neither my....................................................to university.

8. You can ask John or Tom to help you prune the trees.( either )

- You can.......................................................to help you prune the trees.

III. Fill in : a lot ( of ), much or many.

1. Ther can't be ............people who haven't seen Jurassic Park.

2.She doesn't have..............time to hersefl these days.

3.Why haven't you washed the dishes ? You didn't have............else to do.

4. He's very popular. He always has ..................people at his house.

5. We don't get on very well as we haven't got..............in common.

6. Will there be ..............guests at the wedding ?

7. You need .......................courage to be a firefighter.

8. Have...............new people joined the club this year ?

9. There are too...............mistakes in your composition.

10. There's still ....................... food left over from the party last night.

11. I hope we didn't make .................noise when we came in late last night.

12. She's eaten too......sweets so she doesn't feel well.

13. There's ..........................poverty in some African countries.

14. She must have ............money to afford such expensive clothes.

I. Join the sentences, the indetify the functions of the linking words in bracket.

1. He's not a very good tennis player. He practises all the time.( Considering )

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2. He decided to change jobs. He wanted a chance to be more creative.( On the grounds that )

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3. He's afraid of heights. He wants to go rock climbing.( and yet )

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4.This house is exactly what we are looking for. It's a real bargain.( Moreover)

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5.It was an interesting conference. There was one speaker who was boring.( in spite of )

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6. She always gives money to poor people. She's extremely generous.( In other words)

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7. Exercising will help you feel better. Eating less will improve your health.( Likewise )

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8. He he isn't qualified for the job. he hasn't had much practical experience ( what is more )

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9. You can play tennis for free here. You have to book advance though.( Provided )

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10. I received a letter today. It was about my insurance policy.( Regarding )

Exercise . Complete the sentences using the words in bold. Use two to five words.

20. If there had been a phone nearby, he would have called an ambulance. (there)

→Had ___________________________nearby, he would have called an ambulance.

21. The door to the basement isn’t to be left open on any account. (account)

→On ___________________________to the basement to be left open.

22. We won’t tell anybody the good news until we’re certain it’s true. (will)

→Not until we’ve certain it’s true ___________________________anybody the good news.

23. He felt so unwell that he had to cancel their date. (did)

→So ___________________________that he had to cancel their date.

24. Bob forgot his mother’s birthday and his sister’s too. (did)

→Bob didn’t remember his mother’s birthday; ___________________________his sister’s.

25. He was so anxious that he kept biting his nails. (his)

→Such ___________________________he kept biting his nails.

26. Brown bread is healthier and tastier than white bread. (only)

→Not ___________________________than white bread, but it’s healthier too!

27. I didn’t expect that they would throw a surprise party for my birthday. (expect)

→Little ___________________________they would throw a surprise party for my birthday.

28. It isn’t often that temperatures in Spain fall below 00C. (fall)

→Seldom ___________________________below 00C in Spain.

29. If I were you, I’d accept the offer. (you) →

Were___________________________ accept the offer.

30. This is the only way the Prime Minister can win the election. (this)

→ Only ___________________________the Prime Minister win the election

I. Complete the sentences using the words in bold. Use two to five words.

1. Crisps are not as nutrious as nuts.(less)

=> Crisps............nuts.

2. No other job is as well-paid.(best)

- It......job.

3. John and I have received the same number of job offers.( many)

- I have received.......John.

4.Last night i felt more tired than ever.(as)

- I have........I did last night.

5. As he gets older, he becomes less tolerant.(The)

-The.......tolerant he becomes.