Earth, our beautiful home planet, is the only astronomical object to accommodate life as we know it. Scientists believe Earth was formed approximately 4.5 billion years ago. It is the fifth-largest planet in our solar system. Its equatorial diameter is about 12,074 kilometres. Earth is the third-closest planet to the sun. The distance from Earth to the sun is roughly 149,600,000 kilometres. It takes 365.3 days for Earth to orbit the sun, and 24 hours to rotate on its axis. The surface temperature ranges from -88 to 58°C. Nearly 70 percent of Earth’s surface is covered by ocean, which has an average depth of about 4 kilometres. In 2015 it was estimated that 7.3 billion humans are living on Earth. 26. As we know it, Earth is the only planet that accommodates life. It is …… A. habitat B. habitual C. habitable D. habit 27. In our solar system, ………….. planets are larger than Earth. A. four B. three C. two D. five 28. There are ………………… planets between Earth and the sun. A. four B. two C. three D. one 29. The hottest place on Earth may have the temperature of …………….. A.-88°C B. 40°C C. 58°C D. 85°C 30. It takes ……………………… for Earth to rotate on its axis. A. one day B. one month C. one year D. one week Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to the following exchange. (from 31 to 32) 31: I think we should use less paper so that we can save tres in the forests. –“………………..” A. Congratulations B. yes,I’d love to C. That’s a good idea D. It’s nice of you to say so 32: . John " I've passed my final exams " - Tom ".............." A. That's a good idea B. It's nice of you to say so C. Congratulatons ! D. Good luck !