单项选择题

Since the middle of this century（）has been learned about space than in all human history before that time.

A. much
B. more
C. better
D. a lot

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There is not much（）left for those books on the shelf. Better clear some away.

A. place
B. area
C. space
D. room
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—We're sure of winning the match. —（）. We'll meet our match.

A. Don't be so sure
B. So are we
C. It's out of question
D. I think so
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