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

Basic to any understanding of Canada in the 20 years after the Second World War is the country's impressive population growth. For every three Canadians in 1945, there were over five in 1966. In September 1966, Canada's population passed the 20 million mark. Most of this surging growth came  from natural increase. The depression of the 1930s and the war had held back marriages, and the catching-up process began after 1945. The baby boom continued through the decade of the1950s, producing a population increase of nearly fifteen percent in the five years from 1951 to 1956. This rate of increase had been exceeded only once before in Canada's history, in the decade before 1911 when the prairies were being settled. Undoubtedly, the good economic conditions of the 1950s supported a growth in the population, but the expansion also derived from a trend toward earlier marriages and an increase in the average size of families. In 1957 the Canadian birth rate stood at 28 per thousand, one of the highest  in the world.

After the peak year of 1957, the birth rate in Canada began to decline. It continued falling until in 1966 it stood at the lowest level in 25 years. Partly this decline reflected the low level of births during the depression and the war, but it was also caused by changes in Canadian society. Young people were staying at school longer; more women were working; young married couples were buying automobiles or houses before starting families; rising living standards were cutting down the size of families.

It appeared that Canada was once more falling in step with the trend toward smaller families that had occurred all through the Western world since the time of the Industrial Revolution. Although the growth in Canada's population had slowed down by 1966 (the increase in the first half of the 1960's was only nine percent), another large population wave was coming over the horizon. It would be composed of the children who were born during the period of the high birth rate prior to 1957.

The phrase "prior to" in the last paragraph is closest in meaning to………. 

A. behind

B. since

C. during

D. before 

Giải phương trình (x - 2)2 = 7/2 bằng cách điền vào các chỗ trống (…) trong các đẳng thức:

(x - 2)2 = 7/2 ⇔ x – 2 = … ⇔ x = …

Vậy phương trình có hai nghiệm là: x1 = …, x2 = …

rừng phòng hộ không được khai thác vi rừng phòng hộ có vai trò chống sói mòn , sạt lở đất , lũ lụt . nên khi khai thác rừng phòng hộ sẽ gây ra thiên tai ảnh hưởng đến kinh tế và đời sống con người

- thường xuyên dọn dẹp vệ sinh cho chuồng nuôi -nhiệt độ trong chuồng ấ áp vào mùa đông , thoáng mát vào mùa hè hướng chuồng và kiểu chuồng phải phù hợp với đặc điểm và tập quá của vật nuôi -chuồng phải đủ ánh sáng , thúc ăn nước uống sạch - chỗ đựng phân , chất thải phải hợp vệ sinh.

chúc bạn hk tốt

Mark the letter A, B, C or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.

Our parents j o i n   h a n d s to give us a nice house and a happy home

A. work together

B. give a hand

C. take hand

D. shake hands

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the question.

By mid-century, there will likely be 9 billion people on the planet, consuming ever more resources and leading ever more technologically complex lives. What will our cities be like? How much will artificial intelligence advance? Will global warming trigger catastrophic changes, or will we be able to engineer our way out of the climate change crisis?

Making predictions is, by nature, a dicey business, but to celebrate the 40^th anniversary of Smithsonian magazine Big Think asked top minds from a variety of fields to weigh in on what the future holds 40 years from now. The result is our latest special series, Life in 20 50. Demographic changes in world population and population growth will certainly be dramatic. Rockefeller University mathematical biologist Joel Cohen says it's likely that by 2050 the majority of the people in the world will live in urban areas, and will have a significantly higher average age than people today. Cities theorist Richard Florida

thinks urbanization trends will reinvent the education system of the United States, making our economy less real estate driven and erasing the divisions between home and work.

Large migrations from developing countries like Indonesia, Malaysia, Bangladesh, Mexico, and countries in the Middle East could disrupt western governments and harm the unity of France, Germany, Spain, the Netherlands, Poland, and the United Kingdom under the umbrella of the European Union.

And rapidly advancing technology will continue ever more rapidly. According to Bill Mitchell, the late director of MIT's Smart Cities research group, cities of the future won't look like "some sort of science -fiction fantasy" or "Star Trek" but it's likely that "discreet, unobtrusive" technological advances and information overlays, i.e. virtual reality and augmented reality, will change how we live in significant ways. Self-driving cars will make the roads safer, driving more efficient, and provide faster transports. A larger version of driverless cars-driverless trucks-may make long haul drivers obsolete.

Meanwhile, the Internet will continue to radically transform media, destroying the traditional model of what a news organization is, says author and former New York Times Public Editor, Daniel Okrent, who believes the most common kinds of news organizations in the future will be "individuals and small alliances of individuals” reporting and publishing on niche topics.

Which of the following best describes the author’s attitude about the life in 2050?

A. pessimistic       

B. optimistic         

C. doubtful           

D. anxious