问题
选择题
The number of books in the bookshop is about 10,000 and a number of them _______ about science.[ ]
A. is
B. was
C. are
D. were
答案
答案：C
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The number of books in the bookshop is about 10,000 and a number of them _______ about science.[ ]
A. is
B. was
C. are
D. were
答案：C