She did a funny little curtsy which Josh and Silver couldn't help _____ at.

A. laugh .   

B. laughing 

C. to laugh 

D. to laughing

Trong pha tối của thực vật C­₃, chất nhận CO₂ đầu tiên là chất nào sau đây?

A. APG

B. PEP

C. AOA

D. Ribulôzơ 1-5-diP

Vật liệu nào sau đây không thể làm nam châm?

A.Sắt non.

B.Đồng ôxít .

C.Sắt ôxít.

D.Mangan ôxít.

Khi nói về hóa thạch, phát biểu nào sau đây sai?

A. Dựa vào hóa thạch có thể biết được lịch sử phát sinh, phát triển và diệt vong của các loài sinh vật

B. Hóa thạch là di tích của các sinh vật để lại trong các lớp đất đá của vỏ Trái Đất

C. Hóa thạch cung cấp cho chúng ta những bằng chứng gián tiếp về lịch sử phát triển của sinh giới

D. Có thể xác định tuổi của hóa thạch bằng phương pháp phân tích các đồng vị phóng xạ có trong hóa thạch

Mô tả nguyên tắc cấu tạo của tranzito (lưỡng cực) n-p-n. vẽ ký hiệu của tranzito này theo tên gọi các điện cực của nó.

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 .

Computer programmer David Jones earns £35,000 a year designing new computer games, yet he cannot find a bank prepared to let him have a cheque card. Instead, he has been told to wait another two years, until he is 18.

The 16-year-old works for a small firm in Liverpool, where the problem of most young people of his age is finding a job. David's firm releases two new games for the expanding home computer market each month. But David's biggest headache is what to do with his money.

Despite his salary, earned by inventing new programs within tight schedules, with bonus payments and profit-sharing, he cannot drive a car, take out a mortgage, or obtain credit cards.

He lives with his parents in their council house in Liverpool, where his father is a bus driver. His company has to pay £150 a month in taxi fares to get him the five miles to work and back every day because David cannot drive.

David got his job with the Liverpool-based company four months ago, a year after leaving school with six O-levels and working for a time in a computer shop. "I got the job because the people who run the firm knew I had already written some programs," he said.

"I suppose £35,000 sounds a lot but actually that's being pessimistic. I hope it will come to more than that this year." He spends some of his money on records and clothes, and gives his mother £20 a week. But most his spare time is spent working.

"Unfortunately, computing was not part of our studies at school," he said. "But 1 had been studying it in books and 'magazines for four years in my spare time. 1 knew what 1 wanted to do and never considered staying on at school. Most people in this business are fairly young, anyway."

David added: "I would like to earn a million and 1 suppose early retirement is a possibility. You never know when the market might disappear."

David's greatest problem is _____.

A. learning to drive

B. spending his salary

C. inventing computer games

D. making the banks treat him as an adult

Ở điều kiện thường, kim loại nào sau đây tác dụng mạnh với H₂O

A. Fe

B. Ca

C. Cu

D. Mg

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each the numbered blanks.

Setting up and running a car company was an expensive business and required a lot of workers. A company that makes its money out of a smart app requires less capital, doesn't have to pay (25) _____ storage or transport in the way that car companies do and (26) _____ virtually no extra costs as the number of users increases. In the jargon of economics, the marginal costs per unit of output tend towards zero and the returns to scale are high. This explains why tech entrepreneurs can get very rich very young.

Technological change has always been (27) _____. There was a polarization of income and wealth in the first wave of industrialization at the beginning of the 19^th century, and this gave rise to political and institutional change over the 100 years between 1850 and 1950: the spread of democracy, the emergence of trade unions; progressive taxation and the development of social safety nets. These helped create bigger markets for the consumer goods that were spawned by the second Industrial Revolution: TVs, radios, vacuum cleaners and the like. (28) _____ over the past four decades a political model that both facilitated the spread of technology and provided some protection against its disruptive consequences has come under attack. Welfare states have become less generous, levels of long-term unemployment are much higher, taxation has become less progressive, and politics has increasingly been dominated by those with the deepest pockets (29) _____ can lobby the loudest.

Điền vào số (27)

A. disruptive        

B. disrupt.   

C. disruption        

D. disruptively

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 .

Computer programmer David Jones earns £35,000 a year designing new computer games, yet he cannot find a bank prepared to let him have a cheque card. Instead, he has been told to wait another two years, until he is 18.

The 16-year-old works for a small firm in Liverpool, where the problem of most young people of his age is finding a job. David's firm releases two new games for the expanding home computer market each month. But David's biggest headache is what to do with his money.

Despite his salary, earned by inventing new programs within tight schedules, with bonus payments and profit-sharing, he cannot drive a car, take out a mortgage, or obtain credit cards.

He lives with his parents in their council house in Liverpool, where his father is a bus driver. His company has to pay £150 a month in taxi fares to get him the five miles to work and back every day because David cannot drive.

David got his job with the Liverpool-based company four months ago, a year after leaving school with six O-levels and working for a time in a computer shop. "I got the job because the people who run the firm knew I had already written some programs," he said.

"I suppose £35,000 sounds a lot but actually that's being pessimistic. I hope it will come to more than that this year." He spends some of his money on records and clothes, and gives his mother £20 a week. But most his spare time is spent working.

"Unfortunately, computing was not part of our studies at school," he said. "But 1 had been studying it in books and 'magazines for four years in my spare time. 1 knew what 1 wanted to do and never considered staying on at school. Most people in this business are fairly young, anyway."

David added: "I would like to earn a million and 1 suppose early retirement is a possibility. You never know when the market might disappear."

Why is David different from other young people at his age?

A. He earns an extremely high salary

B. He lives at home with his parents

C. He does not go out much

D. He is not unemployed