看完章节内词汇视频,再完成此作业 选择题号填空: 1. Some home and office buildings in the U.S are now being heated with __________ energy. lunar B. solar C. water D. natural 2. On July 20th, 1969, two American __________ planted the first human footsteps on the moon. A. visitors B. scientists C. pilots D. astronauts 3. For thousands of years __________ have been looking at the moon, studying its appearance and its motion through the sky. A. astronomers B. detectors C. writers D. educators 4. The ancient Babylon calendar was quite similar to the Chinese __________ calendar. A. astral B. solar C. lunar D. man-made 5. At one time or another every thinking person had speculated about his place in the __________. A. air B. city C. country D. cosmos 6. For three years, the __________ followed one another. It's unlucky for them. A. desert B. disasters C. invitation D. harvests 7. New York is considered as a __________ in the business. A. capital B. well-known place C. tourist attraction D. cosmopolis 8. Seagulls glided overhead on __________ currents. A. sea B. swift C. wings D. aerial 9. Now we know that the fishes in the sea are all __________. A. brutal B. salty C. brown D. pretty 10. A/An __________ alerts the readers to look for additional information at the foot of the paper. A. acid B. pure C. asterisk D. ashy