Rain forests cover less than six percent of the earth’s area, but they have 100,000 kinds of all the kinds of plants on the earth. Three-fourths of known kinds of plants and animals call the rain forest their home. Twenty percent of our different kinds of medicine comes from rain forests. The glues on an envelope and in shoes come from tropical plants. Rain forests provide materials for hundreds of other products.

Rain forests are also very important to the world’s climate. The Amazon rain forest alone receives about thirty to forty percent of the total rainfall on the earth and products about the same percentage of the world oxygen. Some scientists believe that the decreasing size of rain forests will affect the climate on the earth, making it uncomfortable or even dangerous for life.

Saving rain forests is an international problem. One country, or even a few countries, cannot solve the problem alone. The nations of the world must work together to find a solution before it is too late.

According to some scientists, what will the decreasing size of rain forests affect on the earth?

The word “pseudonym” in the passage refers to ___________.

What is the main idea of the passage?

Why did the teachers ask each band to play two songs?

The word "rough"in the passage  is closest in meaning to ...........

What can the word invokes be best replaced by?

What happened when he saw the jumbo jet for the first time?

Students who are not well – prepared to be young “adults” with all the responsibilities of life will need ______.

The word “tolerate” in paragraph 5 is closest in meaning to ............

According to the passage, an exuberant tone of voice may be an indication of a person’s ............

The phrase ‘suck out’ in paragraph 2 is closest in meaning to which of the following?

It can be inferred from the passage that the Puritans who traveled to the Massachusetts colony were __________.

According to the writer, “A picture is worth a thousand words” means __________.

The word "essential" in paragraph 1 is closest in meaning to .......

According to the passage, nowadays we can find the Asiatic lion ........

Is it difficult to learn how to apologize somebody?

In the first paragraph, Bradstreet, Warren, and Adams are mentioned to show that ...........

The word "triggered" in paragraph 1 is closest in meaning to ...........

What does the passage mainly discuss?

Which of the following would the writer support?

How many orchid seeds are typically pollinated at one time?