Số đipeptit tối đa có thể tạo ra từ một hỗn hợp gồm alanin và glyxin là

A. 2

B. 3

C. 4

D. 1

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.

Panel painting, common in thirteenth- and fourteenth-century Europe, involved a painstaking, laborious process. Wooden planks were joined, covered with gesso to prepare the surface for painting, and then polished smooth with special tools. On this perfect surface, the artist would sketch a composition with chalk, refine it with inks, and then begin the deliberate process of applying thin layers of egg tempera paint (egg yolk in which pigments are suspended) with small brushes. The successive layering of these meticulously applied paints produced the final translucent colors.

Backgrounds or gold were made by carefully applying sheets of gold leaf, and then embellishing of decorating the gold leaf by punching it with a metal rod on which a pattern had been embossed . Every step in the process was slow and deliberate. The quick-drying tempera demanded that the artist know exactly where each stroke be placed before the brush met the panel, and it required the use of fine brushes. It was, therefore, an ideal technique for emphasizing the hard linear edges and pure, fine areas of color that were so much a part of the overall aesthetic of the time. The notion that an artist could or would dash off an idea in a fit of spontaneous inspiration was completely alien to these deliberately produced works.

Furthermore, making these paintings was so time-consuming that it demanded assistance. All such work was done by collective enterprise in the workshops. The painter or master who is credited with

having created the painting may have designed the work and overseen its production, but it is highly unlikely that the artist’s hand applied every stroke of the brush. More likely, numerous assistants, who had been trained to imitate the artist’s style, applied the paint. The carpenter’s shop probably provided the frame and perhaps supplied the panel, and yet another shop supplied the gold. Thus, not only many hands, but also many shops were involved in the final product.

      In spite of problems with their condition, restoration, and preservation, many  panel paintings have survived, and today many of them are housed in museum collections.

The “collective enterprise” mentioned includes all of the following EXCEPT_______.

A. supplying the gold leaf       

B. applying the paint

C. selling then painting            

D. building the panels

Read the passage and choose the best answer

Except for a few unfortunate individuals, no law in this world can go against the fact that for most of us our family is an essential part of our lives. The moment you enter this cruel world, where each man is for himself, there are some near and dear ones out there who will do anything to ensure your happiness.

We are nothing more than a vulnerable and fragile object, without someone taking care of us on our arrival in this world. Despite all the odds, your family will take care of your wellbeing, and try their best to provide you the greatest comforts in the worled. No one out there, except your family must forgive the endless number of mistakes you may make in your life. Apart from teaching you forgive and forget lessons, they are always there for you, when you need them the most.

Family is the only place where children study a lot after school. In school, teachers teach children about the subjects which will help them to find a good job in future. But at home, parents teach children about good habits. They are not only the elements which help the children to shape their personalities but they also prepare them a suitable and bright future.

A good family makes a greater society. Father, mother, and children have to work in order to build a strong family. If any one of them fails, the whole family may collapse. The good name of the whole family can be ruined by a single member of the family. In order to avoid that unhappy scenario, every family member has to work hard and try their best. As a result, they will set good examples for the whole society. Families have a powerful impact on society and societies create countries.

The word ruined in paragraph 4 is closest in meaning to______.

A. built

B. constructed

C. destroyed

D. saved

Cho các phát biểu sau về phenol (C₆H₅OH):

(1) Phenol vừa tác dụng với dung dịch NaOH vừa tác dụng được với Na.

(2) Phenol làm mất màu dung dịch Br₂, tạo kết tủa trắng.

(3) Phenol không làm quỳ tím bị đổi màu.

(4) Phenol phản ứng được với dung dịch KHCO₃ tạo ra CO₂.

(5) Phenol là một ancol thơm.

Số phát biểu đúng là

A. 2.

B. 4.

C. 3.

D. 5.

Cho 5,3 gam hỗn hợp X gồm HCOOH và CH₃COOH (có tỷ lệ mol 1:1) tác dụng với 5,75 gam C₂H₅OH (với axit H₂SO₄ đặc xúc tác), thu được m gam hỗn hợp este (hiệu suất các phản ứng este hóa đều bằng 80%). Giá trị m là:

A. 16,24

B. 12,50

C. 6,48

D. 8,12

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 from 28 to 34.

A letter of application is a sales letter in which you are both salesperson and product, for the purpose of an application is to attract an employer’s attention and persuade him or her to grant you an interview. To do this, the letter presents what you can offer the employer, rather than what you want from the job.

Like a resume, the letter of application is a sample of your work and an opportunity to demonstrate your skills and personality. If it is written with flair and understanding and prepared with prefessional care, it is likely to be very effective. While the resume must be factual, objective, and brief, the letter is your chance to interpret and expand. It should state explicitly how your background relates to the specific job, and it should emphasise your strongest and most relevant characteristics. The letter should demonstrate that you know both yourself and the company.

The letter of application must communicate your ambition and enthusiasm. Yet it must be modest. It should be neither aggressive nor compliant: neither pat yourself on the back nor ask for sympathy. It should never express dissatisfaction with the present or former job or employer. And you should avoid discussing your reasons for leaving your last job.

Finally, it is best that you not broach the subject on salary. Indeed, even if a job advertisement requires that you mention your salary requirements, it is advisable simply to call them “negotiable.” However, when you go on an interview, you should be prepared to mention a salary range. For this reason, you should investigate both your field and, if possible, the particular company. You don’t want to ask for less than you deserve or more than is reasonable.

(Adapted from “Select Readings – Intermediate” by Linda Lee and Erik Gundersen)

The word “explicitly” in paragraph 2 is closest in meaning to _______.

A. clearly

B. slightly

C. quickly

D. shortly