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

Đề : Viết lại câu sao cho nghĩa khong thay đổi,sử dụng cấu trúc so sánh hơn "more/less"
1 Today the sun shines more brightly than yesterday.
->.......................................................................................
2 This cake is more freshly made than that one
->......................................................................................
3 Jim behaves more politely than his younger brother
->......................................................................................
4Teenagers act more violently these days than in the past
->......................................................................................
5  The doctor treats his patients less patiently than he should
->......................................................................................
6  My sister speaks more quickly than i
->......................................................................................
7  Now mary drrives more carefully than she used to
->......................................................................................
8  This summer i go to the beach more often than the last summer
->........................................................................................

E5. Rewrite the following sentences in reported speech.

1. “New Year's Eve is always on December 31st,” she said.

She said (that) ___________________________________________________________________.

2. “The Earth revolves around the Sun,” the teacher said to the students.

The teacher said to the students (that) ________________________________________________.

3. “I have something to show you,” I said to her.

I said to her that  _________________________________________________________________.

4. “I must go to the dentist tomorrow,” he said.

He said that  _____________________________________________________________________.

5. “I'll come with you as soon as I'm ready,” she said.

She said to me that  _______________________________________________________________.

6. “What time did you leave yesterday?” she asked.

She asked me  ___________________________________________________________________.

7. “Can I have a piece of cake?” she asked.

She asked me ____________________________________________________________________.

8. “Are there any shopping centers nearby?” she asked.

She wanted to know  ______________________________________________________________.

/ Rewrite the following sentences in reported speech..
1. “Is New Year's Eve always on December 31st,” she asked.
She asked ______________________________________
2. “Do The Earth revolve around the Sun,” the teacher asked the students.
The teacher said to the students (that) ___________________
3. “I have something to show you,” I said to her.
I said to her that _____________________________________
4. “I must go to the dentist tomorrow,” he said.
He said that ________________________________________
5. “I'll come with you as soon as I'm ready,” she said.
She said to me that __________________________________
6. “What time did you leave yesterday?” she asked.
She asked me ______________________________________
7. “Can I have a piece of cake?” she asked.
She asked me ______________________________________
8. “Are there any shopping centers nearby?” she asked.
She wanted to know _________________________________
9. "Which dress do you like best?" she asked her boyfriend.
She asked her boyfriend______________________________________
10. "What are they doing?" she asked.
She asked______________________________________
11. "Are you going to the cinema?" he asked me.
He asked______________________________________
12. The teacher asked, "Who speaks English?"
The teacher asked______________________________________
13. Lan said “I will be very busy tomorrow.”
Lan said______________________________________
14. Thu said “All the students will have a meeting next week.” 
Thu said ______________________________________
my work. 

He said that ________________________________________

EXERCISE ; Rewrite the jollowing sentences using If clauses.

1.She can't be employed because she doesn't have a college degree.

-

2.I don't have enough money. I can't go on a long holiday this year.

-

3.He is very slow, so we won't give his such an important task.

-

4.I'll have to work this Sunday ,so I shan't join your picnic.

-

5.He works overtime to get more money because he has to pay father's debt.

-

6.City life isn't enjoyable because everything is very expensive.

-

7.There are industrial factories inside the city , that's why pollution can't be reduced

-

8.Everything on the earth grows well because the sun always shines.

-

9.There is a grammar error in this English composition, that's why it can't get a full mark.

-

10.I don't have a typewriter. I can't type it myself.

-

11.I'll buy a new hat. I'll give it to you

-

12.You'll ask the teacher. He'll explain the lesson to you.

-

13.Mary doesn't see the sight.She can't tell you about that.

-

14.I don't know his address. I can't give it to you.

-

15.He didn't look a lot better because he didn't shave more often.

-

16.She was ill .She didn't go to work.

-

17.It was raining all morning. We didn't go out.

-

18.He was tired. He made a mistake.

-

19.Peter didn't write to me. I didn't wirte to him.

-

20.You didn't ask Alise .She didn't tell you the truth.

-