tìm lỗi sai ở câu này, sửa: the mother asked her children did not to play in the kitchen . (lưu ý có giải thích tại sao sửa lỗi này)

Mercury is the smallest member of the sun's family. It is only 3.100 miles across. It is also the sun's swiftest planet. Its yearly journey round the sun is only 85 days.

Mercury always keeps one side towards the sun. On this side it is always day, on the other side always night. We only see the lighted side.

Mercury appears to us like a yellowish orange star. The nearest planet to the sun, it is always seen near the sun, either just before sunrise or soon after sunset. People sometimes call mercury the morning star or evening star.

Mercury is half the size of the earth. Because it is much lighter, it has much less gravity. If you can visit Mercury in a spaceship, you will find it a strange world. Its low gravity makes you feel very light. If your weight on earth is 100 pounds, your weight on Mercury is only 27 pounds. Looking at the sun from Mercury, you can see that it's much more brilliant than it is seen from the earth. And the yellow centre of the sun appears three times bigger from Mercury.

On its lighted side, Mercury's temperature is about 300 degrees centigrate. But the dark side is extremely cold, but 150 degrees below zero so mercury is probably the coldest as well as the hottest of the planets.

21. A. Mercury is .......

A. the sun's fastest planet B. the coldest planet

C. the hottest planet D. all are correct

22. We cannot see the dark side of Mercury because .......

A. it moves very fast.

B. it always appears just before sunrise or soon after sunset.

C. it always keeps one side towards the sun.

D. it is too far for us to see.

23. When can we see Mercury? - We can see it ......

A. just before the sunset

B. just before sunrise

C. after the sunset

D. both A and C are correct

24. Why do we weigh much on the earth than on Mercury? - Because .......

A. Mercury is nearer to the sun. B. Mercury has got less gravity than the earth.

C. Mercury is much hotter. D. none are correct.

25. Why does the sun look bigger when it is seen from Mercury?

- Because .......

A. Mercury is the smallest planet of the sun.

B. Mercury is nearer to the sun.

C. Mercury is a light planet.

D. It only takes Mercury 88 days to move round the sun.

Chọn đáp án và giải thích chi tiết

I can't cook as well as my mother does.

My friend,..........father is a teacher , is very good at English A.whom B. whose (chọn đáp án và giải thích chi tiết vì sao chọn )

Read the following passage and choose the best answer for each question.

Tigers are one of the most powerful and graceful animals in the world. The different species that still exist today, namely the Bengal, Indochina, Siberian, South China and Sumatra tigers are in danger of becoming extinct. Due to irresponsible hunting, the Bali, Caspian and Java tigers have already become extinct. This could soon happen to the other species too.

In the past, tigers were considered as pests. With a smaller area to hunt, as man had taken up more of the land to build upon, the tigers found less area for themselves to hunt. They thus turned to farms to get their food. Farmers’ livestock were attacked by these tigers. People were then encouraged to hunt and kill these animals with the promise of rewards. Even after the threat of tigers on livestock was over, man continued to hunt tigers, this time for recreation. Poachers too hunt tigers for their body parts knowing that the skin of tigers is much sought after. Bones and other organs are also used as ingredients in traditional Chinese medicine. Although killing is illegal, it is still being carried out unless it is stopped, the remaining species of tigers will soon become extinct too.

8.How many species of tigers were there originally?

A.three B. Four C. Five D. eight

9.There were fewer hunting grounds for the tigers because _____

A.man had occupied the land B. the farmers put their livestock there

C.the tiger population was becoming bigger D. they liked hunting livestock

10.Man continues hunting tigers even they are no longer pests because _____

A.he treats it as a form of recreation B. he loves tigers very much

C.he still thinks tigers are pests D. he wants to make the tigers extinct

11.Poachers are people who _____

A.look after tigers B. make Chinese medicine

C.hunt tigers illegally D. hunt tigers’ body parts

12.Illegal poaching will _____

A.cause the extinction of tigers

B.increase the amount of Chinese medicine

C.increase the amount of Chinese medicine

D.increase the price of body parts

Chọn đáp án và giải thích tại sao chọn đáp án đó.