Choose the best option A, B, C or D to complete each of the sentences from 21 to 39.

We can’t even walk in the storm. Let’s wait in the hallway where we’ll be ______ the strong winds until things quiet down.

A. protecting from

B. protected from

C. protected by

D. protecting by

Dãy gồm các dung dịch đều tham gia phản ứng tráng bạc là:

A. Glucozơ, axit fomic, anđehit axetic

B. Glucozơ, glixerol, mantozơ, axit fomic

C. Frutozơ, glixerol, anđehit axetic

D. Glucozơ, frutozơ, saccarozơ

Read the following passage and choose the letter A, B, C or D to indicate the correct answer to each of the questions from 11 to 20.

Although speech is generally accepted as the most advanced form of communication, there are many ways of communicating without using words. In every known culture, signals, signs, symbols, and gestures are commonly utilized as instruments of communication. There is a great deal of agreement among communication scientists as to what each of these methods is and how each differs from the others. For instance, the basic function of any signal is to impinge upon the environment in such a way that it attracts attention, as, for example, the dots and dashes that can be applied in a telegraph circuit. Coded to refer to speech, the potential for communication through these dots and dashes—short and long intervals as the circuit is broken—is very great. Less adaptable to the codification of words, signs also contain agreed upon meaning; that is, they convey information in and of themselves. Two examples are the hexagonal red sign that conveys the meaning of stop, and the red and white swirled pole outside a shop that communicates the meaning of barber.

Symbols are more difficult to describe than either signals or signs because of their intricate relationship with the receiver’s culture perceptions. In some cultures, applauding in a theater provides performers with an auditory symbol of approval. In other cultures, if done in unison, applauding can be a symbol of the audience’s discontent with the performance. Gestures such as weaving and handshaking also communicate certain culture messages.

Although signals, signs, symbols, and gestures are very useful, they also have a major disadvantage in communication. They usually do not allow ideas to be shared without the sender being directly adjacent to the receiver. Without an exchange of ideas, interaction comes to a halt. As a result, means of communication intended to be used across long distances and extended periods must be based upon speech. To radio, television, and the telephone, one must add fax, paging systems, electronic mail, and the internet, and no one doubts but that there are more means of communication on the horizon.

The word it in paragraph 1 refers to ______.

A. signal

B. function

C. environment

D. way

Hòa tan 2,88 gam  XSO 4 vào nước thu được dung dịch Y. Điện phân dung dịch Y (với điện cực trơ) trong thời gian t giây thì được m gam kim loại ở catot và 0,007 mol khí ở anot. Nếu thời gian điện phân là 2t giây thì ở catot thu được kim loại và tổng số mol khí (ở cả 2 bên điện cực) là 0,024 mol. Giá trị của m là : 

A. 0,784

B. 0,91

C. 0,896

D. 0,336

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.

One of the most interesting authors of the twentieth century, J.R.R Tolkien, achieved fame through his highly inventive trilogy. The Lord of the Rings. Born in 1892, Tolkien received his education from Oxford and then served in World War I. After the war, he became a professor of Anglo -Saxon and English language and literature at Oxford University.

Although published in 1965, the three books that comprise the Lord of the Rings were written in intervals from 1936 to 1949. This was mainly due to Tolkien's responsibilities as a professor and the outbreak of World War II. By the late 1960s, this fascinating trilogy had become a sociological phenomenon as young people intently studied the mythology and legends created by Tolkien.

The trilogy is remarkable not only for its highly developed account of historical fiction but also its success as a modern heroic epic. The main plot describes the struggle between good and evil kingdom as they try to acquire a magic ring that has the power to rule the world. The novels, which are set in a time called Middle Earth, describe a detailed fantasy world. Established before humans populated the Earth, Middle Earth was inhabited by good and evil creatures such as hobbits, elves, monsters, wizards, and some humans. The characters and the setting of Middle Earth were modeled after mythological stories from Greece and Northern Europe.

Although readers have scrutinized the texts for inner meaning and have tried to connect the trilogy with Tolkien's real life experiences in England during World War II, he denied the connection. He claims that the story began in his years as an undergraduate student and grew out of his desire to create mythology and legends about elves and their language.

Tolkien was a masterful fantasy novelist who used his extensive knowledge of folklore to create a body of work that is still read and enjoyed throughout the world today.

What can we assume is NOT true about Middle Earth?

A. Middle Earth was based on European folktales

B. Middle Earth was a fictional world

C. The good and evil kingdom fought for the power

D. People dominated Middle Earth

Thủy phân hết 1 lượng pentapeptit trong môi trường axit thu được 32,88 gam A l a - G l y - A l a - G l y ; 10,85 gam A l a - G l y - A l a ; 16,24 gam A l a - G l y - G l y ; 26,28 gam A l a - G l y ; 8,9 gam Alanin còn lại là G l y - G l y và Glyxin. Tỉ lệ số mol G l y - G l y : G l y là 5 : 4 . Tổng khối lượng Gly-Gly và Glyxin trong hỗn hợp sản phẩm là:

A. 43,2 gam

B. 32,4 gam

C. 19,44 gam

D. 28,8 gam