A D A D A D B C D B

Vì x539y chia 5 dư 2 nên y = 2 hoặc y = 7        (1)

Vì x539y chia 2 dư 1 nên y lẻ          (2)  

Từ (1) và (2) suy ra y = 7 thay vào ta được số x5397

Mà x5397 chia 9 dư 3 nên x + 5 + 3 + 9 + 7 chia 9 dư 3 hay x + 24 chia 9 dư 3 nên x + 24 = 30. Tìm được x = 6.

Vậy x = 6, y = 7

tố cáo luôn

đừng có xúc phạm bạn ấy như thế

hách quá

Ex1.Complete the sentence with the comparative form of adverb.

1. I speak English _more fluently_ now than last year. (fluently)

2. They smiled _more happily_ than before. (happily)

3. Tom arrived _earlier_ than I expected. (early)

4. We will meet _later_ in the afternoon. (late)

5. Mary dances _more gracefully_ than anyone else. (gracefully)

Ex2.Rewrite the following sentences without changing their original meanings.

1. I don’t think you are taller than me. -> I don’t think I am shorter than you.

2. Is Jim worse at Math than John? -> Is John better at Math than Jim?

3. Jim looks much younger than his classmates. -> Jim’s classmates look older than him.

4. Your hair is longer than mine. -> My hair is shorter than yours.

1.  Jim boasted that he could run (faster/ fastlier) than anyone else in his class.

2.  Her presentation is (poorer/more poorly) prepared than I expected.

3.  Jim seems to care (littler/ less) about his health than he should.

4.  If you had tried (harder/ more hardly), you would have passed the test.

5.  Today the sun shines (brighter/ more brightly) than yesterday.

6.  Snow storm in my hometown is (more severe/ more severely) than anywhere else in the country.

7.  I think you could reach a (higher/ more highly) position in the company if you tried.

8.  If you behaved (cleverer/ more cleverly), they would look up to you..

9.  Although my computer is old-fashioned, it runs (smoother/ more smoothly) than many of the modern ones.

10.     Thanks to immense practice, Jim can speak English much (more fluent/ more fluently) than he used to.

The planet Earth is 4,600 million years old. It is difficult for us to think about such an enormous length of time because it has little meaning for us. We can, however, simplify the idea to make it more understandable. We can compare the planet Earth to a person of forty-six years of age.
Nothing is known about the first seven years of this person’s life. Very little information exists about the middle period either. It was only at the age of forty-two that the Earth began to flower.
Dinosaurs and great reptiles did not appear until one year ago, when the planet was forty-five. Mammals only arrived eight month ago. In the middle of last week, man-like apes became ape-like men and began to communicate with each other. Last weekend, the Ice Age covered the Earth.
Modern man has only been around for four hours. During the last hour man discovered agriculture. The Industrial Revolution and the rise of large cities began just sixty seconds ago.
During that short time, modern man has made a rubbish tip of the Earth. In one minutes, he has increased his numbers to terrible proportions, and has caused the death of hundred of species of animals. He has robbed and destroyed the planet in his search for fuels. Now he stands, like a violent, spoilt child, delighted at the speed of his rise to power, on the edge of the final mass destruction and of killing all the life which exists in the solar system.
  46. According to the passage, ____.
       a. our planet is over 4,600 million years old
       b. dinosaurs and great reptiles appeared during the Ice Age
       c. man-like apes can communicate with each other
       d. we know nothing about the first period of the life of our planet
  47. In the context of the passage, what does the word “flower” mean?
       a. to develop fully                                                   b. to produce flowers
       c. to become famous                                               d. to become more successful
  48. Which of the following is not true?
       a. Modern man is destroying the Earth
       b. Modern man has caused the distinction of hundreds of species of animals
       c. We know very little about the middle period of the Earth’s life
       d. We now live in a time called the Ice Age
  49. From reading the passage, it seems that the author ____ . 
       a. approves modern man’s activities
       b. thinks that modern man has no right to destroy the Earth
       c. thinks that modern man has been the most successful animal
       d. says that modern man should kill all life which exists in the solar system
  50. The tone of the last paragraph is best described as ____ . 
       a. somewhat hopeful                         b. pessimistic
       c. militant                                          d. overly optimistic