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. Body postures and movements are frequently indicators of self-confidence, energy, fatigue, or status. Cognitively, gestures operate to clarify, contradict, or replace verbal messages. Gestures also serve an important function with regard to regulating the flow of conversation. For example, if a student is talking about something in front of the class, single nods of the head from the teacher will likely cause that student to continue and perhaps more elaborate. Postures as well as gestures are used to indicate attitudes, status, affective moods, approval, deception, warmth, arid other variables related to conversation interaction.The saying “A picture is worth a thousand words” well describes the meaning of facial expressions. Facial appearance – including wrinkles, muscle tone, skin coloration, and eye color-offers enduring cues that reveal information about age, sex, race, ethnic origin, and status.A less permanent second set of facial cues-including length of hair, hairstyle, cleanliness, and facial hairrelate to an individual’s idea of beauty. A third group of facial markers are momentary expressions that signal that cause changes in the forehead, eyebrows, eyelids, cheeks, nose, lips, and chin, such as raising the eyebrows, wrinkling the brow, curling the lip.

Some facial expressions are readily visible, while others are fleeting. Both types can positively or negatively reinforce the spoken words and convey cues concerning emotions and attitudes.

Gestures __________.

A. can do nothing with a conversation

B. can clarify the meaning of verbal messages

C. may interrupt the flow of a conversation

D. can end a conversation more quickly than usual

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the best answer for each question from 40 to 47.

        Cooking shows on TV are usually all about exotic foods. Thank to globalization, people everywhere are introducing their taste buds to dishes from every corner of the world. At the same time, other people are discovering that food from their area is the best kept secret. In the past few years, this movement of purchasing local produce keeps picking up steam because it offers a lot of benefits. For starters, local food is often tastier because it is fresher. Goods that are imported from abroad must be flown or shinped in from far away, so they naturally lose some of their freshness during the journey. A simple way to test this is to sample a banana from overseas versus one that was grown locally and compare the tastes. Imported goods must also be washed and packaged in plastic or other containers so they can survive the journey. These materials may cause the nutritional value of these goods to decline during the shipping process. Food safety is another reason why people are choosing local produce. Today's laws regarding foods vary from country to country. This causes confusion and makes it difficult to detect if any harmful pesticides were used. When you know the local farmer who grows your food and the fields that are used to produce it, the chances of it being contaminated are greatly reduced.

        Buying local foods can also have beneficial impact on the environment. By supporting local growers, consumers can maintain green space and farmland in their communities. Buying locally also helps to build the local community. If farmers can sell directly to consumers instead of a middleman, they will earn more money for their families. Additional profits also enable farmers to better care for their soil and keep quality standards high. In the end, it is a win-win situation for both parties.

      If you are interested in incorporating more local foods into your diet, you can start by attending a farmers' market in your area. This is an open market where farmers sell fruits, vegetables, and meat directly to the public. If you have any questions about the production process or quality of these goods, you can ask the farmers directly. Once you experience the freshness of local foods for yourself, it might be tough to go back to the supermarket.

 The word “beneficial” in paragraph 3 is closest in meaning to ___________.

A. solvable

B. helpful

C. detrimental

D. edible

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

A. panda             

B. wildlife             

C. rhinoceros                 

D. vulnerable

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.

The pain of a migraine headache can virtually disable a person who suffers from it. Millions and millions of people suffer from migraines, although many of them do not even recognize that a migraine is different from a regular headache. A migraine is not at all the same as a normal headache, and it seems to have a very physical cause.

One symptom of a migraine is a precursor, which is a visual aura before an attack. Yet only about a third of patients actually experience that, and it is, therefore, not a requirement in the diagnosis. Other symptoms include increased pain when a person moves, nausea, and sensitivity to light and sound.

Scientists now believe that migraines are caused, not by abnormal blood vessels as previously believed, but instead by a unique electrical disorder of brain cells. Physicians used to treat migraines with medicine to constrict blood vessels because of the belief that dilated blood vessels were the cause. The new research has been enhanced by imaging devices that allow scientists to watch patients’ brains during an attack. The results show that sufferers have abnormally excitable neurons, or brain nerve cells. Prior to the attack, the neurons suddenly fire off electrical pulses at the back of the brain, which ripple like waves on a lake after a stone hits the water. They ripple across the top and then the back of the brain, ultimately affecting the brain stem where the pain centers are located. The pain then generates possibly from the brain stem itself or from blood vessels inflamed by the rapidly changingblood flow, or perhaps from both.

Scientists have experimented by applying a powerful magnet to stimulate the neurons and discovered that some people’s brains react differently than others’. When stimulation was applied to the brains of people who had suffered migraines, they saw the initial aura, and some actually suffered migraines. When the same stimulation was applied to the brains of people who had never suffered migraines, they realized no effect and the neurons showed no change.

Scientists and doctors continue to work on the research in an attempt to find the perfect treatment. It is considered important to treat migraines because it is believed that prolonged untreated attacks could cause physical changes in the brain leading to chronic pain.

Scientists have caused neurons to react by applying_________.

A. electric charges          

B. imaging            

C. a magnetic field                   

D. drugs

Tiến hành các thí nghiệm sau :

(1) Cho dung dịch NH₃ dư vào dung dịch AgNO₃.

(2) Sục khí SO₂ vào dung dịch H₂S.

(3) Cho dung dịch AgNO₃ vào dung dịch H₃PO₄.

(4) Cho dung dịch AgNO₃ vào dung dịch HCl.

(5) Cho dung dịch NaOH dư vào dung dịch  AlCl₃.

Sau khi kết thúc thí nghiệm, số trường hợp tạo thành kết tủa là :

A. 5

B. 2.   

C. 4

D. 3.