问题
选择题
| The number of the books over 500 in his room. And a number of them on art and music. |
A. is; is B. is; are C. are; is D. are; are |
答案
答案：B
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| The number of the books over 500 in his room. And a number of them on art and music. |
A. is; is B. is; are C. are; is D. are; are |
答案：B