Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from .

Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.

          The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health. On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't agree.

What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

          As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

According to the passage, what makes mobile phones potentially harmful is _____.

A.  their radiant light

B. their power of attraction       

C. their raiding power

D. their invisible rays

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Mary’s lawyer advised her_______ anything further about the accident.

A. not saying

B. telling

C. not to say

D. not tell

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Belgium is a very old country, with a fascinating mixture of old customs and modern laws. Belgium weddings may be performed as a civil ceremony or as a religious ceremony.

Traditionally, when a couple in Belgium wishes to announce their marriage, the wedding invitations are printed on two sheets of paper, one from the bride's family and one sheet from the groom's family. These wedding invitations symbolize the union of the two families and the partnership of the new union.

An ancient Belgium custom that is designed to unite the two families calls for the bride to stop as she walks up the isle and to hand her mother a single flower. The two then embrace. Then, during the recessional, the bride and groom walk to the groom's mother and the new bride hands her new mother-in-law a single flower and the two of them embrace, symbolizing the bride's acceptance of her new mother.

One of the most important and enduring traditions of the Belgium wedding is for the bride to carry a specially embroidered handkerchief that has her name embroidered on it. After the wedding this handkerchief is framed and hung on the wall in a place of honor. When the next female member of the bride's family is to be wed, the handkerchief is removed from its frame, the new bride's name is embroidered onto it, and it is passed down. The wedding handkerchief is passed from generation to generation, and is considered an important family heirloom.

During the wedding mass, the bride and the groom are enthroned in two large chairs placed near the altar, symbolizing that on this day and in this place they are the king and the queen. At the conclusion of the ceremony, the groom slips the wedding ring onto the third finger of his bride's left hand. The ring, being an endless circle, symbolizes never-ending love, and the third finger of the left hand is believed to hold the vein that travels to the heart, symbolizing love. At the conclusion of the ceremony, the bride and groom share their first kiss as husband and wife. The kiss is considered a symbolic act of sharing each other's spirit as the couple each breathes in a portion of their new mate's soul.

The bridesmaids traditionally take up a collection of coins and as the bride and groom exit the church, the bridesmaids toss the coins to the poor outside the church. Giving gifts of money to the poor helps to insure prosperity for the new bride and groom.

Following the wedding the bride and groom are off on their honeymoon. In ancient times the honeymoon, which was celebrated by the drinking of mead, or honey wine, would last 28 days, one complete cycle of the moon. This was to make sure that the bride's family did not try to steal their daughter back from her new husband. 

According to paragraph 5, what is CORRECT about the wedding ring? 

A. It is wom onto the third finger of the bride's right hand

B. The groom wears the ring for his mate at the beginning of the ceremony. 

C. The ring represents the boundless love of the couple. 

D. The ring is presented by the queen and the king of their country. 

a)Tích của \(\dfrac{1}{4}xy^3\)và -2x²yz² là:

\(\dfrac{1}{4}xy^3\). ( -2x²yz² ) = \(\dfrac{-1}{2}\)x³y⁴z²

Đơn thức trên có hệ số là \(\dfrac{-1}{2}\)và có bậc là 9

b)Tích của -2x²yz và-3xy³z là:

-2x²yz . (-3xy³z) = 6 x³y⁴z²

Đơn thức trên có hệ số là 6 và có bậc là 9

a) M (x) = ( 2x⁴-x⁴ ) + ( 5x³-x³-4x³ ) + ( 3x²-x² ) + 1 = x⁴ + 2x² +1

b) * M (1) = 1⁴ + 2.1² + 1 = 1 + 2 + 1 = 4

* M (-1) = (-1)⁴ + 2.(-1)² + 1 = 1+2+1=4

c) M (x) = x⁴ + 2x² + 1

Ta có: x⁴ > hoặc = 0 ; x² > hoặc = 0 với mọi giá trị của x thuộc R

nên x⁴ + 2x² + 1 > hoặc = 1 với mọi giá trị của x thuộc R

Vậy M (x) = x⁴ + 2x² + 1 không có nghiệm với mọi giá trị của x thuộc R

- Vì bán đảo X- căng- đi- na- vi chịu ảnh hưởng của dòng biển nóng Bắc Đại Tây Dương và gió Tây ôn đới nên khí hậu ấm áp và mưa nhiều

- Vì phần lớn bán đảo X- căng- đi- na-vi là núi và cao nguyên

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to the sentence given in each of the following questions

It was such a beautiful creature that everyone stopped to have a look.

A. So beautiful was the creature that everyone stopped to have a look.

B. So beautiful was the creature that everyone stopped to had a look.

C. So beautiful was the creature everyone stopped to have a look.

D. So beautiful was the creature that everyone stopp to have a look.