Người ta điều chế nitơ trong phòng thí nghiệm bằng cách nào sau đây?

A. Nhiệt phân NH₄NO₃

B. Chưng cất phân đoạn không khí lỏng

C. Nhiệt phân hỗn hợp NH₄Cl và NaNO₂

D. Đốt cháy phốt pho trong bình không khí

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.LakeBaikalinRussiais 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. TheMediterranean 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.

Điền vào ô 7

A. shore

B. land 

C. ground

D. soul

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.

Ever since humans inhabited the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language barrier, communication is accomplished through sign language in which motions stand for letters, words, and ideas. Tourists, the deaf, and the mute have had to resort to this form of expression. Many of these symbols of whole words are very picturesque and exact and can be used internationally; spelling, however, cannot.

Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of flirting or indicating that the party is only joking. A nod signifies approval, while shaking the head indicates a negative reaction.

Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals. Road maps and picture signs also guide, warn, and instruct people.

While verbalization is the most common form of language, other Systems and techniques also express human thoughts and feelings.

(Source: TOEFL Reading)

Who would be MOST likely to use Morse code? 

A. A scientist

B . An airline pilot 

C. A spy

D. A telegrapher

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

Most educational specialists believe that early schooling should provide children with an (27) ________ of their own abilities and the self-confidence to use their abilities. One approach recognised by many (28) ________ as promoting these qualities is the Montessori method, first practised by Maria Montessori of Italy in the early 1900s. Nancy McCormick Rambusch is credited with (29) ________ the method in the United States, where today there are over 400 Montessori schools.

The method helps children learn for themselves by (30) ________ them with instructional materials and tasks that facilitate acts of discovery and manipulation. Through such exploration, children develop their sense of touch and learn (31) ________ to do everyday tasks without adult assistance. Other benefits include improvement in language skills, and acquaintance with elements of science, music, and art.

Điền ô số 28

A. researcher

B. teacher

C. tutors

D. experts

Phát biểu nào sau đây là đúng?

A. Phân lân cung cấp nitơ hóa hợp cho cây dưới dạng ion nitrat ( NO 3 - ) và ion amoni ( NH 4 + ).

B. Amophot là hỗn hợp các muối (NH₄)₂HPO₄ và KNO₃

C. Phân hỗn hợp chứa nitơ, photpho, kali được gọi chung là phân NPK

D. Phân urê có công thức là (NH₂)₂O

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 blanks

Owning a pet

The joys and tribulations of being a pet owner! During our lifetime most of us have some experience of either owning a pet or being in (7) _______ contact with someone who does. Is there such a things as “the ideal pet”? If so what characterizes the ideal pet? Various (8) _______ influence one’s choice of pet, from your reasons for getting a pet to your lifestyle. For example, although quite a few pets are relatively cheap to buy, the cost of upkeep can be considerable. Everything must be (9) _______ into account, from food and bedding, to vaccinations and veterinary bills. You must be prepared to (10) _______ time on your pet, which involves shopping for it, cleaning and feeling it. Pets can be demanding and a big responsibility. Are you prepared to exercise and housetrain an animal or do you prefer a more independent pet? How much spare room do you have? Is it right to lock an energetic animal into a confined space? Do you live near a busy road which may threaten the life of your pet? Pets such as turtles and goldfish can be cheap and convenient, but if you prefer affectionate pets, a friendly cat or dog would be more (11)

Điền ô số 11

A. suited

B. appropriate

C. likely

D. good

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

It is raining heavily with rolls of thunder. We ……………….such a terrible thunderstorm. 

A. would never see 

B. had never seen 

C. have never seen 

D. never see