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题型:单选题 题类:常考题 难易度:普通

新目标英语九年级(全)Unit 6 When was it invented?(Section B)同步练习

In our school library there ____________ a number of books on science, and in these years the number of them ____________ growing larger and larger.

A、are; is B、is; are C、have; are D、has; is
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