Mark the letter A, B, C, D on your answer sheet to show the underlined part that needs correction.

You’ll be able to hold  the audience’s attention if your speech is live enough.

A. to hold  

B. the audience’s  

C. if   

D. live enough

The twins look so much alike that no one can_________them___________

A. take/ apart

B. tell/ away

C. tell/ apart

D. take/ on

Khi nói về peptit và protein, phát biểu nào sau đây là sai ?

A. Liên kết của nhóm –CO– với nhóm –NH– giữa hai đơn vị a-amino axit được gọi là liên kết peptit

B. Tất cả các protein đều tan trong nước tạo thành dung dịch keo

C. Protein có phản ứng màu biure với Cu(OH)₂

D. Thủy phân hoàn toàn protein đơn giản thu được các a-amino axit

Dung dịch Na 2 CO 3  phản ứng được với:

A. anđehit axetic

B. phenol

C. rượu etylic

D. axit axetic

Hình viên phân là phần hình tròn giới hạn bởi một cung và dây căng cung ấy. Hãy tính diện tích hình viên phân AmB, biết góc ở tâm AOB = 60o và bán kính đường tròn là 5,1cm (h.64).

Hình 64

Mark the letter A, B, C or D in your answer sheet to indicate the underlined part that needs correction in each of the following questions.

They asked me what did happen the night before, but I was unable to tell them.

A. asked     

B. did happen       

C. but         

D. to tell

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

The two countries have reached an agreement through dialogues described as ________.

A. counterproductive

B. unproductive

C. productivity

D. productive

TNT (2,4,6- trinitrotoluen) được điều chế bằng phản ứng của toluen với hỗn hợp gồm HNO₃ đặc và H₂SO₄ đặc, trong điều kiện đun nóng. Biết hiệu suất của toàn bộ quá trình tổng hợp là 80%. Lượng TNT (2,4,6- trinitrotoluen) tạo thành từ 230 gam toluen là

A. 550,0 gam.

B. 687,5 gam.

C. 567,5 gam.

D. 454,0 gam.

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. 

           People used to know more or less how their children would live. Now things are changing so quickly that they don’t even know what their own lives will be like in a few years’ time. What follows is not science fiction. It is how experts see the future.

          You are daydreaming behind the steering wheel; is it too dangerous? No! That’s no problem because you have it on automatic pilot, and with its hi-tech computers and cameras, your car “know” how to get you home safe and sound.

          What is for lunch? In the old days you used to stop off to buy a hamburger or a pizza. Now you use your diagnostic machine to find out which foods your body needs. If your body needs more vegetables and less fat, your food-preparation machine makes you a salad.

          After lunch, you go down the hall to your home office. Here you have everything you need to do your work. Thanks to your information screen and your latest generation computer, you needn’t go to the office any more. The information screen shows an urgentmessage from a co-worker in Brazil. You can instantly send back a reply to him and go on to deal with other matters.

Which “reply” CLOSET in meaning to?

A. replay    

B. request.   

C. answer    

D. question

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.

BRINGING THE LEARNING OUTDOORS

          Kindergarten is a fun place (31) ________ young children learn. In some special kindergartens, children learn outside most of the day!
          Some kindergartens are (32) ________ the forest. In these "forest kindergartens," children play freely. They're outside in all kinds of weather. At forest kindergartens, children learn by climbing trees and picking fruit. They also learn about and (33) ________ animals. For example, they collect chicken eggs and feed baby mice.
          Little Flower Kindergarten is in Dong Nai, Vietnam. At this school, children learn about farming. They also learn that it is important (34) ________ healthy food. They grow vegetables in gardens - on the roof! They eat the vegetables they grow in their lunches.
          At Fuji Kindergarten in Tokyo, Japan, trees grow inside the building! The classroom windows and sliding doors (35) ________ open to the outside most of the year. The roof is a big, wooden circle. Children love to play and run on it

Điền ô số 31

A. why

B. when

C. where

D. which