第一、二周 1.3 第一单元词汇测试
1、 Some home and office buildings in the U.S are now being heated with____ energy.
答案: solar
2、 On July 20th, 1969, two American____ planted the first human footsteps on the moon.
答案: astronauts
3、 For thousands of years____ have been looking at the moon, studying its appearance and its motion through the sky.
答案: astronomers
4、 The ancient Babylon calendar was