问题补充:
Green is the color of nature. And you can enjoy the colorful rainbow in sky after the rain.
A. the; the
B. /; a
C. /; the
D. a; the
答案:
A. the; the
B. /; a
(答案→)C. /; the
D. a; the
解析:句意;绿色是大自然的颜色。雨后你能在天空中欣赏到多彩的彩虹。结合语境可知前文泛指大自然,nature是抽象名词,不可数,泛指不用冠词。下文特指雨后的天空,故用定冠词,选C。