(2013·安徽，21)From space, the earth looks blue.This is about seventy­one percent of its

发布时间：2020-08-17 08:35:28

(2013·安徽，21)From space, the earth looks blue.This is     about seventy­one percent of its surface is covered by water.
A. why
B. how
C. because
D. whether

网友回答

(答案→)A. why
B. how
C. because
D. whether
解析：考查名词性从句。此处考查表语从句。根据句意：地球看起来是蓝色的。这是因为其表面71%是被水覆盖的。
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