Tìm điều kiện xác định của các biểu thức sau:

a) \(\sqrt{3-2x}\)

b)\(\sqrt{\frac{1}{3+2x}}\)

c) \(\sqrt{x^2-4}\)

d) \(\left(\frac{1}{\sqrt{x}-2}+\frac{\sqrt{x}}{\sqrt{x+1}}\right):\frac{\sqrt{x}}{\sqrt{x}-3}\)

e)\(\sqrt{\frac{2}{\sqrt{7-\sqrt{x}}}}\)

f) \(\sqrt{\frac{x+3}{5-x}}\)

Make a complex sentences from each pair of sentences. Use the subordinator provided and make any necessary changes.

1. Their son is allergetic to animals. They decided to get a cat. (though)

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2. He will stay in England for two months more. He can perfect his English. (in order that)

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3. There is nothing to eat. We have to go shopping today. (as)

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4. I go to Hue next week. I will stay with my aunt and uncle. (when)

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5. Mai could have good marks. She studied hard for the exam. (so that)

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6. We need an umbrella. It is raining heavily outside. ( since)

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7. Nick will vist some craft villages. He finishes the Vietnamese course. (after)

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8. We decided to go for a walk in the park. It was very cold out. (even though)

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9. The tourists wanted to buy some silk. They went to Van Phuc village. (because)

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10. They won't buy the new car. Thay save enough money. (until)

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Given the correct form of the word in capitals to complete each of the following sentences.

1. There are a lot of silk______________such as scarves, ties and dresses in our shop. (PRODUCE)

2. Bat Trang is one of the most famous _______________craft villages in Hanoi. (TRADITION)

3. We should read this leaflet to see what ____________are organized during the festival. (ACT)

4. They showed me a marble sculpture which was____________made by hand. (SKILL)

5. Last week we had a_______________trip to an ancient village on the outskirts of Hanoi. (MEMORY)

6. Obviously, our handicrafts are in______________with those of other villages. (COMPLETE)

7. Do you know that__________________have to follow 15 stages to make a conical hat? (ART)

8. My grandfather has devoted himself to many____________events in our community. (CULTURE)

9. You should spend at least one week to vist the tourist_____________in this city. (ATTRACT)

10. We are impressed by a wide______________of lacquerwares in the showroom. (VARE)

THANKS NHÌU

Choose the best answer A, B, C or D to complete the sentences.

1. A lot of trees..............along the stress in order to protect environment from air pollution.

A. Plant

B. Plants

C. is planted

D. Are planted

2. It’s very pleasant to bathe in the river................hot days in the summers.

A. of

B. On

C. for

D. in

3. This problem is hard to solve......................its’s very complicated.

A. So

B.although

C. Because

D. But

4. She expects................a doctor.

A. To become

B. To becoming.

C. Becoming

D. Become

5. I was glad .....................see him again after ten years.

A. To seeing

B. Seeing

C. To see

D. See

BÀI TẬP VỀ CÂU GIÁN TIẾP

Ex 1. Commands/ Requests

1. The teacher said to Tim , "Come into my office, please".

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2. Their mother said to them, "Don't make so much noise".

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3. The traffic policeman said, "Show me your driving license, please".

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4. Mrs Jackson said to Alice, "Could ou give me a hand, please".

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5. Nam said to the taxi driver, "Please turn left at the first traffic light".

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Change these sentences into passive voice.

1. Some one takes her to school every week.

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2. Some one is taking her to school now.

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3. Someone has just taken her to school.

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4. Someone took her to school yesterday.

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5. Someone was taking her to school at this time yesterday.

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6. Someone had taken her to school before I got to her house.

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7. Someone will take her to school soon.

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8. Someone should take her to school.

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9. Someone must take her to school.

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10. Someone has to take her to school.

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11. Someone used to take her to school when she was young.

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12. Someone will continue to take her to school.

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13. Someone is going to take her to school.

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14. At 8 o'clock tonight, Jane will be washing the dishes.

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15. she likes someone taking her to school.

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Cho tam giác ABC có AB=11cm ,góc ABC =38\(^0\), góc ACB= 30\(^0\) . Từ A kẻ N vuông góc BC tại N. tính AN, AC và BC

Cho tam giác ABC vuông tại A, đường cao AH, biết ÁC =16cm và SinCAH =\(\frac{4}{5}\) .Tính độ dài AB, BC

Cho 0\(^0\) < α < 90\(^0\) , cos α =\(\frac{3}{5}\) .Tính cos α, tan α, cot α