Normally, which is true regarding permafrost?

Each ethnic group has its own cultural identities, thus, the Vietnamese culture has both            and unity.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

Global Forest Watch has also initiated a project to counteract deforestation through awareness.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27.

Since the early days of making movies, writers and directors (23)           bring popular and classic novels to the big screen. That tradition continues today. The movie industry seems to believe that if the story made a great book, it should make a great movie as well. (24)            , that rarely seems to be the case. More often than not, a great book (25)            to be a mediocre movie in the opinion of most (26)             . Perhaps that is because readers of the book have already made their own great "movies" in their heads. Then, when they see the studio's or the director's version of the story, it does not quite measure up to their (27)             .

Since the early days of making movies, writers and directors (23)           bring popular and classic novels to the big screen.

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 41 to 47.

Alaska is disappearing slowly, but surely. It is estimated that since the 1950s, as much as fifteen percent of Alaska's land area has disappeared. How can a whole state be disappearing? The problem is that Alaska's glaciers are melting. The state has more than 100,000 glaciers. These glaciers account for about 75,000 square kilometers, or five percent, of the state's area. That is an area of land larger than Ireland!

According to a recent report by the US Geological Survey, ninety-nine percent of Alaska's glaciers are either retreating or diminishing. This diminishing seems mainly due to the increase in global temperatures. Since the 1960s, the average year-round temperature has increased by almost 3° C.

Additionally, the average winter temperature has increased by over 6° C.

Presently, an estimated 100 cubic kilometers of ice is disappearing from Alaskan glaciers every year. It maybe even more in the near future, as some scientists predict that the average world temperature could go up 4 to 7°C by the year 2100.

Another problem facing Alaska is its thawing permafrost. Much of the land in Alaska used to be permanently frozen or frozen for most of the year. Now, the thawing permafrost is causing a number of problems for people living in Alaska. Roads and utility poles are collapsing as the ground around and under them warms and softens. Also, the hard permafrost that originally prevented beaches from eroding during violent storms is now melting. People who live along Alaska's coasts are being forced to relocate. For villages on small low islands, one terrible storm could wipe out the entire community.

The melting permafrost and increasing temperatures are both affecting the forests of Alaska. As the permafrost under the forests melts, insects that normally do not turn up until the warmer seasons are appearing sooner. The spruce-bark beetle, for example, is increasing in numbers as a result of warmer winter temperatures. It usually takes about two years for these beetles to grow and reproduce in very cold weather. However, due to the increase in temperatures, spruce-bark beetles are reproducing faster and damaging as many trees in one year as they previously damaged in two. If something cannot be done to change things, Alaska's forests will not survive the turn of the century.

Some scientists believe that human activity is linked to a global increase in weather temperature.

Whatever the cause of rising temperatures may be, the fact remains that temperatures are warming, affecting Alaska for the worse. Horribly, this could be a preview of what will happen to the rest of the world in the next century.

What should be the best title for the passage?

The lessons provided by Duolingo are designed to increase in difficulty as the user            .

We had to put off our wedding until September.

“Will you do me a favour?” - Diana “                  ”

She helped us a lot with our project. We couldn't continue without her.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

Many herbicides and pesticides take a long time to degrade and build up in the soils or throughout the food chain.

Why are the forests in Alaska being destroyed?

“Don’t forget to submit your assignments by Thursday,” said the teacher to the students.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

The sun is a powerful energy source, and this energy source can be harnessed by installing solar.

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

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

So far, more than 12.2 million corona virus cases             in the United States.