A number of books in the library ___been stolen so that the number of them___ smaller than before.
| A．have , is | B．has , is | C．has , are | D．have, are |
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A number of books in the library ___been stolen so that the number of them___ smaller than before.
| A．have , is | B．has , is | C．has , are | D．have, are |
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