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

One of the most urgent environmental problems in the world today is the shortage of clean water. Having clean drinking water is a basic human right. But acid rain, (1)__________pollution and garbage have made many sources of water undrinkable. Lakes, reservoirs and even entire seas have become vast pools (2)__________poison. Lake Baikal in Russia is one of the largest lakes in the world. It (3)__________a rich variety of animals and plants, including 1,300 rare species that do not exist (4)__________else in the world. But they are being destroyed by the massive volumes of toxic effluent which (5)__________into the lake every day. Even where law existed, the government did not have the power to enforce them.

Most industries simply ignore the regulations. The Mediterranean Sea (6)__________1% of the world's

water surface. But it is the dumping (7)__________for 50% of all marine pollution. Almost 16 countries regularly throw industrial wastes a few miles (8)__________shore.

Water is free to everyone. A few years ago, people thought that the supply of clean water in the world was limitless. Today, many water supplies have been (9)__________by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious (10)__________. We should do something now.

(Source: v 14ilovetranslation.com)

Điền vào số 6

A. Makes

B. occupies

C. comprises

D. holds

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 following questions

The observation of the skies has played a special part in the lives and cultures of peoples since the earliest of times. Evidence obtained from a site known as the Hole in the Rock, in Papago Park in Phoenix, Arizona, indicates that it might have been used as an observatory by a prehistoric people known as the Hohokam.

The physical attributes of the site allow its use as a natural calendar/clock. The "hole" at Hole in the Rock is formed by two large overhanging rocks coming together at a point, creating a shelter with an opening large enough for several persons to pass through. The northeast-facing overhang has a smaller opening in its roof. It is this smaller hole that produces the attributes that may have been used as a calendar/clock.

Because of its location in the shelter's roof, a beam of sunlight can pass through this second hole and cast a spot onto the shelter's wall and floor. This spot of light travels from west to east as the sun moves across the sky. It also moves from north to south and back again as the Earth travels around the Sun. the west-to-east movement could have been used to establish a daily clock, much like a sundial, while the north-to-south movement could have been used to establish a seasonal calendar.

The spot first appears and starts down the surface of the wall of the shelter at different times of the morning depending on the time of the year. The spot grows in size from its first appearance until its maximum size is achieved roughly at midday. It then continues its downward movement until it reaches a point where it jumps to the floor of the shelter. As the Sun continues to move to the west, the spot continues to move across the shelter floor and down the butte, or hill, toward a group of small boulders. If a person is seated on a certain one of these rocks as the spot reaches it, the Sun can be viewed through the calendar hole. This occurs at different times in the afternoon depending on the time of year.

The word obtained is closest in meaning to__________ .

A. covered           

B. removed                    

C. acquired                    

D. transported

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

We cut down many forests. The Earth becomes hot.

A. The more we cut down forests, the Earth becomes hotter

B. The more we cut down forests, the hotter the Earth becomes.

C. The more forests we cut down, the hotter the Earth becomes.

D. The more forests we cut down, the Earth becomes hotter.

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

– I have gone to the doctor’s to have a checkup.

 - You _______ You just had your check-up last week!

A. don’t need to go

B. needn’t go

C. didn’t need to go

D. needn’t have gone

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

Daisy: “ Would you mind getting me a cup of coffee?”                              -John: “ _______”

A. Cream and sugar, please

B. No, thanks

C. I never drink coffee

D. It’s my pleasure

Read the following passage and mark the letter A, B , C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Speech is one of the most important (13) ______ of communicating. It consists of far more than just making noises. To talk and also to (14) ______ by other people, we have to speak a language, that is, we have to use combinations of (15) ______ that everyone agrees to stand for a particular object or idea. Communication would be impossible if everyone made up their own language.

Learning a language properly is very (16)______ . The basic (17) ______ of English is not very large, and not only about 2,000 words are needed to speak it quite (18)______. But the more idea you can (19) ______ the more precise you can be about their exact meaning.

Words are the (20) ______ thing we use in communicating what we want to say. The way we (21)______ the words is also very important. Our tone of voice can express many emotions and (22) ______ whether we are pleased or angry, for instance.

Điền vào ô 17

A. grammar 

B. structure 

C. vocabulary

D. word

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.

In the history of technology, computers and calculators were innovative developments. They are essentially different from all other machines because they have a memory. This memory stores instructions and information. In a calculator, the instructions are the various functions of arithmetic, which are permanently remembered by the machine and cannot be altered or added to. The information consists of the numbers keyed in.

An electronic pocket calculator can perform almost instant arithmetic. A calculator requires an input unit to feed in numbers, a processing unit to make the calculation, a memory unit, and an output unit to display the result. The calculator is powered by a small battery or by a panel of solar cells. Inside is a microchip that contains the memory and processing units and also controls the input unit, which is the keyboard, and the output unit, which is the display.

The input unit has keys for numbers and operations. Beneath the key is a printed circuit board containing a set of contacts for each key. Pressing a key closes the contacts and sends a signal along a pair of lines in the circuit board to the processing unit, in which the binary code for that key is stored in the memory. The processing unit also sends the code to the display. Each key is connected by a different pair of lines to the processing unit, which repeatedly checks the lines to find out when a pair is linked by a key.

The memory unit stores the arithmetic instructions for the processing unit and holds the temporary results that occur during calculation. Storage cells in the memory unit hold the binary codes for the keys that have been pressed. The number codes, together with the operation code for the plus key, are held in temporary cells until the processing unit requires them.
When the equals key is pressed, it sends a signal to the processing unit. This takes the operation code-for example, addition-and the two numbers being held in the memory unit and performs the operation on the two numbers. A full adder does the addition, and the result goes to the decoder in the calculator's microchip. This code is then sent to the liquid crystal display unit, which shows the result, or output, of the calculation.

The word "contacts" in paragraph 3 is closest in meaning to

A. commands

B. codes

C. locations

D. connections