Cho tam giác ABC cân tại A. Đường cao AH . E là hình chiếu của H trên AC. N là trung điểm của EC.

a) Chứng minh HN//BE

b) O là trung điểm của HE. CMR: ON//HC

c) CMR: AO ⊥ BE

In an effort to fight pollution and help the environment, the Marina Hills Ecology Club offers free trees to institutions willing to plant them on their grounds. Among those that took advantage of the offer was Marina Hills High School. After consulting with his teachers on where to plant the trees, Principal Max Webb contacted the Ecology Club. But when the seedlings arrived, Webb had an idea. Instead of planting the young trees in front of the school, he thought it would be better to put them behind the school, where the sun gets very hot in the afternoon. “It gets so hot inside the building that the students start to sweat during their afternoon classes,” said Webb. “Now the shade from our trees will bring them some relief.”

     “There was no argument from the teachers,” he added. “When I proposed the idea, everyone said, “Why didn’t I think of that?”. “The relief won’t come until the trees grow taller, but the school will not have to wait long because it requested two species of trees that grow quickly. “Time is key, and we wanted our trees to get big fast,” said Webb. “We were given a wide choice, from shrubs to fruit trees. We requested eucalyptus and willow trees.” Webb said he is also looking forward to finally seeing some wildlife in the school yard at Marina Hills High School. “If all you have is a grass lawn with no trees, you can’t expect the local birds to come and visit,” said Webb. “They have no place to make their nests. Now that will change, and we’ll be able to see birds from our classroom windows.”

28. What would be the most appropriate headline for this article?

     A. Local School Gets Greener             B. student Wins Science Award

     C. Principal Discovers New Trees        D. Teacher Leads Ecological Club

29. What problem does Principal Webb talk about?

     A. Pollution in the city                         B. Classrooms that are too hot

     C. Tall trees that block the view           D. Wild animals that destroy trees

30. What did the Ecology Club do for Marina Hills High School?

     A. It helped design the school yard.                 B. It put flowers in the classrooms.

     C. It sold seeds to the school.                          D. It provided free trees.

31. What decision was changed?

     A. Which trees should be dug up.

     B. When the old trees should be cut down.

     C. Where the new trees should be planted.

     D. Which type of tree should be chosen.

32. What can be inferred from the article about eucalyptus and willow trees?

     A. They grow quickly.

     B. They become extremely tall.

     C. They are less expensive than fruit trees.

     D. They do not grow flowers in the springtime.

THE FOUR-YEAR SPREAD OF BUBBLE TEA ACROSS THE UK

     Four years ago bubble tea was relatively unknown in the UK, but the drinks are now ubiquitous on High Streets, from cities to small towns, writes Lucy Townsend.

     It is often brightly coloured, sometimes served with milk, with a layer of jelly-like globules - tapioca balls - that settle (23) …………. the bottom of the cup. Drunk through an extra thick straw with a spoon-shaped tip, it is a mouthful of tea and chewiness - both a drink and a snack.

     Chorley in Lancashire got its first bubble tea bar in July. Huddersfield has ‘Bubble n Shake’, there is a mobile bubble tea van in Bristol, and it can be (24) ……………. in cities from Glasgow to Portsmouth.

     Bubble tea hails from 1980s in Taiwan. It was an evolution from the country's street tea vendors (25) …………….. began experimenting with fruity flavours and colour to entice customers. The “bubble” actually (26) ………….. the froth on top of the drink which comes after it is violently shaken - some cafes use a machine especially for shaking. How the tapioca balls arrived in the drink is a matter of debate - though the most common story is that product development manager Lin Hsiu Hui (27) ………….. sitting in a staff meeting and poured the tapioca from her pudding into her Assam iced tea. The result was considered delicious.

     While growing in the UK, bubble tea is even more popular in Germany, according to the market research firm Mintel. Even McDonald's has started serving it.

23. A. down                 B. in                             C. at                         D. out

24. A. discovered        B. found                      C. searched              D. sought

25. A. which                B. where                      C. who                                 D. whom

26. A. stands for          B. regards to                C. describes             D. refers to

27. A. have been         B. is                             C. has been              D. was

Are Sports Bad for Kids?

     People think children should play sports. Sports are fun, and children stay healthy while playing with others. However, playing sports can have negative effects on children. It may produce feelings of poor self-esteem or aggressive behavior in some children. According to research on kids and sports, 40 million kids play sports in the US. Of these, 18 million say they have been yelled at or called names while playing sports. This leaves many children with a bad impression of sports. They think sports are just too aggressive.

     Many researchers believe adults, especially parents and coaches, are the main cause of too much aggression in children’s sports. They believe children copy aggressive adult behavior. This behavior is then further reinforced through both positive and negative feedback. Parents and coaches are powerful teachers because children usually look up to them. Often these adults behave aggressively themselves, sending children the message that winning is everything. At children’s sporting events, parents may yell insults at other players or cheer when their child behaves aggressively. As well, children may be taught that hurting other players is acceptable, or they may be pushed to continue playing even when they are injured. In addition, the media makes violence seem exciting. Children watch adult sports games and see violent behavior replayed over and over on television.

     As a society, we really need to face up to this problem and do something about it. Parents and coaches should act as better examples for children. They also need to teach children better values. They should teach children to enjoy themselves whether they win or not. It is not necessary to knock yourself out to enjoy sports. Winning is not everything. In addition, children should not be allowed to continue to play when they are injured. Sending a child with an injury into a game gives the child the message that health is not as important as winning. If we make some basic changes, children might learn to enjoy sports again.

28. What is the main idea of the reading?

     A. Children often become like their parents.

     B. Children need to play sports in school.

     C. Playing sports may have negative results.

     D. Some sports can cause health problems.

29. How many children said they had some negative experience when playing sports?

     A. All of the children                      B. More than half of the children

     C. Less than half of the children     D. About ten percent of the children

30. Which is described as the main cause of more aggressive playing?

     A. Adults                                        B. Children with low grades in school

     C. New rules in sports                     D. Other players

31. What does the writer suggest?

     A. Aggressive sports should not be shown on television.

     B. Children should not play sports until high school.

     C. Coaches should be required to study child psychology.

     D. Parents should teach children to play sports for fun and exercise.

32. What would probably NOT be done when “facing up to a problem”?

     A. Ignoring the problem                              B. Finding the reason

     C. Admitting there is a problem                  D. Looking for a solution

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

1. A. applied                B. steamed                   C. grated               D. enrolled

2. A. promote              B. global                      C. erode                D. astronomy

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

3. A. versatile              B. breathtaking                    C. inaccessible         D. dominance

4. A. flexibility                        B. bilingual              C. confusion            D. affordable

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

5. I decided (A) changing (B) my job because my boss makes me work (C) overtime (D).

6. Several (A) people have apparent (B) tried to change the man’s mind (C), but he refuses to listen (D).

7. Meal time gives (A) children a chance to learn (B) how (C) some of their favorite dishes make (D).

     In an effort to fight pollution and help the environment, the Marina Hills Ecology Club offers free trees to institutions willing to plant them on their grounds. Among those that took advantage of the offer was Marina Hills High School. After consulting with his teachers on where to plant the trees, Principal Max Webb contacted the Ecology Club. But when the seedlings arrived, Webb had an idea. Instead of planting the young trees in front of the school, he thought it would be better to put them behind the school, where the sun gets very hot in the afternoon. “It gets so hot inside the building that the students start to sweat during their afternoon classes,” said Webb. “Now the shade from our trees will bring them some relief.”

     “There was no argument from the teachers,” he added. “When I proposed the idea, everyone said, “Why didn’t I think of that?”. “The relief won’t come until the trees grow taller, but the school will not have to wait long because it requested two species of trees that grow quickly. “Time is key, and we wanted our trees to get big fast,” said Webb. “We were given a wide choice, from shrubs to fruit trees. We requested eucalyptus and willow trees.” Webb said he is also looking forward to finally seeing some wildlife in the school yard at Marina Hills High School. “If all you have is a grass lawn with no trees, you can’t expect the local birds to come and visit,” said Webb. “They have no place to make their nests. Now that will change, and we’ll be able to see birds from our classroom windows.”

28. What would be the most appropriate headline for this article?

     A. Local School Gets Greener             B. student Wins Science Award

     C. Principal Discovers New Trees        D. Teacher Leads Ecological Club

29. What problem does Principal Webb talk about?

     A. Pollution in the city                         B. Classrooms that are too hot

     C. Tall trees that block the view           D. Wild animals that destroy trees

30. What did the Ecology Club do for Marina Hills High School?

     A. It helped design the school yard.                 B. It put flowers in the classrooms.

     C. It sold seeds to the school.                          D. It provided free trees.

31. What decision was changed?

     A. Which trees should be dug up.

     B. When the old trees should be cut down.

     C. Where the new trees should be planted.

     D. Which type of tree should be chosen.

32. What can be inferred from the article about eucalyptus and willow trees?

     A. They grow quickly.

     B. They become extremely tall.

     C. They are less expensive than fruit trees.

     D. They do not grow flowers in the springtime.