Đọc đoạn văn sau và chọn đáp án đúng A, B, C, D From far out in space, Earth looks like a blue ball. Since water covers three-fourths of the Earth's surface, blue is the color we see most. The continents look brown, like small islands floating in the huge, blue sea. White clouds wrap around the Earth like a light blanket. The Earth is shaped like a sphere, or a ball. It is 25,000 miles around! It would take more than a year to walk around the whole planet. A spaceship can fly around the widest part of the sphere in only 90 minutes. Even though spaceships have traveled to the , people cannot visit the without special suits. The has no air or water. Plants and animals can't live there either. Astronauts first landed on the in 1969. After that, there were six more trips to the . They brought back rocks, which scientists are still studying. There are holes, or craters, all over the 's surface. Scientists believe that meteorites smashed into the millions of years ago and formed the craters. The Sun is the closest star to Earth. A star is a hot ball of burning gas. The Sun looks very big because it is so close. But the Sun is just a medium-sized star. Billions of far-away stars are much bigger than our Sun. The burning gases from the Sun are so hot that they warm the Earth from 93 million miles away! Even though the Sun is always glowing, the night here on Earth is dark. That's because the Earth rotates, or turns around, every 24 hours. During the day, the Earth faces the Sun. Then we see light. During the night, the Earth turns away from the Sun. Then it faces the darkness of space. Each day we learn more about the Earth, the , and the Sun. 1. Why is blue the color we see most when looking at Earth from outer space ? A. Because most of the Earth is covered in land. B. Because the Sun's rays make the Earth look blue. C. Because most of the Earth is covered in water. D. Because clouds wrap around the Earth. 2. Scientists believe that meteorites smashed into the millions ago and formed the craters. What does "formed" mean? A. hit B. made C. broke D. stopped 3. What causes daylight on Earth? A. The full causes daylight. B. Daylight is caused by the Earth facing away from the Sun. C. The heat of the Sun's rays causes daylight. D. Daylight is caused by the Earth facing toward the Sun. 4. Which of the following sentences BEST describes the Sun? A. The Sun looks small because it is so far from Earth. B. The Sun is a ball of burning gases that gives the Earth heat and light. C. The Sun is a small star. D. The Sun is not as hot as it looks. 5. Why did the astronauts bring rocks back from the . A. Because they didn’t know if they would return to the ever again. B. Because they wanted to prove that they went to the . C. Because they wanted to study them and learn more about the . 6. What is the main idea of the article? A. plants and animals can’t live on the . B. Without the Sun we would have no heat or light. C. We know a lot about the Earth, , and Sun, but there is still more to learn D. From outer space, the Earth looks tiny, even though it is thousands of miles around.