情字白头1. Which of the following can be used as the best title of the passage?
A. Alaska—A Frozen Land
B. Is Alaska Sinking?
C. Pollution and Global Warming
D. Alaska Is Polluted
A. the temperature in Alaska is rising
B. people in Alaska don’t take care of permafrost
C. too many houses are built on permafrost
D. people in Alaska polluted permafrost
A. holes form in the ground
B. a forest will be turned into a swamp
C. some animals have to go elsewhere
D. more water will be needed by people and animals
4. Which of the following is NOT true according to the passage?
A. When permafrost melts, houses will fall down.
B. House-moving companies are busy because their houses are in danger.
C. To stop permafrost melting is a very difficult problem.
