Exercise 1 : Mark the letter A, B , C , D to indicate the underlined part that needs correction in each of the following questions :

1. Last month , while my friend was traveling round england by the car , he crashed the car into a tree .

2. She was walking to the library to borrow some books when she was seeing a robbery .

3. He can speak French very well and is studying latin .

4. Please turn off television . I aslo like watching TV but now I am having to study for the exam .

5. The researchers of Harvard University reported that the tigers are one of the most dangerous speciesin the jungle .

6. I think a good health is important , and so is education while money , to some extent , is not .

7. He was reading out the data while Sara wrote it down carefully .

8. He would like in the countryside but now he is living in a big city

9. Many people used to think learning English is full of the difficulties .

10. The biggest problem with eating too much sugar is that it can cause the diabetes .

11.The most people need healthy eating and enough exercise every day .

12. The doctor said that she was making a relatively slow progress because she was quite old .

13. Now J.K > Rowling is a multi - milionaire , but she was not born into the fame and fortune .

Cho  a ,   b ,   c  là độ dài các cạnh của tam giác. Giải phương trình sau:  a x 2 + a + b − c x + b = 0

Read the following pasage and mark the letter A. B, C or D on your answer sheet to indicate the correct answer to each of the questions from 41 to 48.

Another critical factor that plays a part in susceptibility to colds is age. A study done by the University of Michigan School of Public Health revealed particulars that seem to hold true for the general population. Infants are the most cold-ridden group, averaging more than six colds in their first year. Boys have more colds than girls up to age three. After the age of three, girls are more susceptible than boy's , and teenege girls average three colds a year to boy’s two.

The general incidence of continues to decline into maturity. Elderly people who are in good health have as few as one or two colds annually. One exception is founds among people in the twentics, especially women, who show a rise in cold infections, because people in this age group are most likely to have young children. Adults who delay having children until thirties forties experience the same sudden increase in cold infections.

The study also found that economics play an important role. As income increases, the frequency at which are reported in the family decreases. Families with the lowest income suffer about a third more colds than families at the lower end. Lower income generally forces people to live in more cramped quarters than those typically occupied by wealthier by wealthier people, and crowding increses the opportunities for the cold virus totravel from person to person. Low income may also adversely influence diet. The degree to which poor nutrition affects susceptibility to colds is not yet clearly established, but an inadequate diet is suspected of lowering resistance generally.

(source: TOEFL reading)

There is information in the second paragraph of the passage to support which of the following conclusions?

A. Men are more susceptible to cold than women

B. Children infect their parents with colds.

C. People who live in a cold climate have more colds than those who live in a warm one.

D. People who don’t have children are more susceptible to colds than those who do.

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. 

          For many American university students, the weeklong spring break holiday means an endless party on a sunny beach in Florida or Mexico. In Panama City Beach, Florida, a city with a permanent population of around 36,000, more than half a million university students arrive during the month of March to play and party, making it the number one spring break destination in the United States.

          A weeklong drinking binge is not for anyone, however, and a growing number of American university students have found a way to make spring break matter. For them, joining or leading a group of volunteers to travel locally or internationally and work to alleviate problems such as poverty, homelessness, or environmental damage makes spring break a unique learning experience that university students can feel good about.

          During one spring break week, students at James Madison University in Virginia participated in 15 “alternative spring break” trips to nearby states, three others to more distant parts of the United States, and five international trips. One group of JMU students traveled to Bogalusa, Louisiana, to help rebuild homes damaged by Hurricane Katrina. Another group traveled to Mississippi to organize creative activities for children living in a homless shelter. One group of students did go to Florida, but not to lie on the sand.  They performed exhausting physical labor such as maintaining hiking trails and destroying invasive plant species that threaten the native Florida ecosystem.

          Students who participate in alternative spring break projects find them very rewarding. While most university students have to get their degrees before they can start helping people, student volunteers are able to help people now. On the other hand, the accommodations are far from glamorous. Students often sleep on the floor of a school or spend the week camping in tents. But students only pay around $250 for meals and transportation, which is much less than some of their peers spend to travel to more traditional spring break hotspots.

          Alternative spring break trips appear to be growing in popularity at universities across the United States. Students cite a number of reason for participating. Some appreciate the opportunity to socialize and meet new friends. Others want to exercise their beliefs about people’s obligation to serve humanity and make the world a better place whatever their reason, these students have discovered something that gives them rich rewards along with a break from school work. (“Active Skills for Reading: Book 2” by Neil J.Anderson – Thompson, 2007)

The article implies that university students______.

A. many take fewer alternative spring break trips in future.

B.  would prefer to wait until they have their degrees to start helping people.

C. complain about accommodations on alternative spring break trips.

D.  spend more than $250 for traditional spring break trips.

cho hàm số y=ax+b có đồ thị là đường thẳng (d). xác định a và b biết (d) cắt trục tung tại điểm có tung độ bằng 2 và trục hoành tại điểm có hoành độ bằng -1

Từ các số 0; 1; 2 lập các số tự nhiên có ba chữ số giống nhau và chia hết cho 5.

Tổng của tử số và mẫu số của một phân số là 4140. Sau khi rút gon phân số đó ta được phân số 7/13. Tìm phân số khi chưa rút gọn. Khi rút gọn được phân số 7/13, vậy tử số có mấy phần bằng nhau và mẫu có mấy phần như thế? ( Tử số có 7 phần bằng nhau thì mẫu số có 13 phần như thế)

Gọi là tế bào nhân sơ vì

A. Chưa có màng bao bọc khối vật chất di truyền

B. Không có vật chất di truyền trong khối tế bào chất

C. Chưa có màng bao bọc khối tế bào chất

D. Không có hệ thống nội màng và các bào quan có màng