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

发布时间：2020-08-17 09:21:35

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

网友回答

A. why
B. how
(答案→)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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