Giải các phương trình sau: x2 – 2√11 x + 11 = 0

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.

   For more than six million American children, coming home after school means coming back to an empty house. Some deal with the situation by watching TV. Some may hide. But all of them have something in common. They spend part of each day alone. They are called “latchkey children”. They are children who look after themselves while their parents work. And their bad condition has become a subject of concern.

   Lynette Long was once the principal of an elementary school. She said, “we had a school rule against wearing jewelry. A lot of kids had chains around their necks with keys attached. I was constantly telling them to put the keys inside shirts. There were so many keys; it never came to my mind what they meant.” Slowly, she learned that they were house keys.

   She and her husband began talking to the children who had keys. They learned of the effect working couples and single parents were having on their children. Fear was the biggest problem faced by children at home alone. One in three latchkey children the Longs talked to reported beinu frightened. Many had nightmares and were worried about their own safety

   The most common way latchkey children deal with their fears is by hiding. They mav hide in a shower stall, under a bed or in a closet. The second is TV. They often turn the volume up It's hard to get statistics on latchkey children, the Longs have learned. Most parents are slow to admit that they leave their children alone.

One thing that the children in the passage share is that _____________ .

A. they all wear jewelry

B. they spend part of each day alone

C. they all watch TV

D. they are from single-parent families

Cho các dung dịch chứa các chất hữu cơ mạch hở sau: glucozơ, glixerol, ancol etylic, axit axetic, propan-1,3-điol, etylen glicol, sobitol, axit oxalic. Số hợp chất đa chức trong dãy có khả năng hòa tan Cu(OH)₂ ở nhiệt độ thường là:

A. 4

B. 6

C. 5

D. 3

Sắc tố tham gia chuyển hóa năng lượng ánh sáng thành năng lượng của các liên kết hóa học trong ATP và NADPH là

A. diệp lục a.

B. diệp lục b

C. carôten.

D. xanthôphyl

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

She is the most intelligent woman I have ever met. 

  A. I have never met a more intelligent woman than her. 

  B. She is not as intelligent as the women I have ever met. 

  C. I have ever met such an intelligent woman. 

  D. She is more intelligent than I am. 

The room needs for the wedding.

A. to decorate      

B. be decorated     

C. decorate 

D. decorating

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

“Why I haven’t thought of this before?” Tony said to himself. 

A. Tony advised himself not to have thought of that before.          

B. Tony suggested himself not thinking of that before. 

C. Tony said that why he hasn’t thought of that before. 

D. Tony wondered why he hadn’t thought of that before. 

Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions.
Question 3

A. require

B. consist

C. achieve

D. system