问题

From space, the earth looks blueThis is ____about seventy-one percent of its surface is covered by water

A: why
B: how
C: because
D: whether

正确答案是：

同类题型

I sent a big bunch of flowers tothe nurse as an of thanks forher taking good care of my grandpa in the nursing home

Since I came to China I’ve known that about seven people _____ten speak Chinese[ ]

__What’s the matter —I’m having trouble_____ who has taken my book.

How many letters have you got from your online friends since last year—_______. We’re just chatting with each other when we’re free.

I won’t give you any help_____ you tell me the truthIt’s none of my business[ ]