------------------- new workes ____________ become members of the factory since last monthA.The number of ; hasB.A number of ; have

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-------------------newworkes____________becomemembersofthefactorysincelastmonthA.Thenumberof;hasB.An

------------------- new workes ____________ become members of the factory since last monthA.The number of ; hasB.A number of ; have
------------------- new workes ____________ become members of the factory since last month
A.The number of ; has
B.A number of ; have

------------------- new workes ____________ become members of the factory since last monthA.The number of ; hasB.A number of ; have
B the number of 指.的数量
a number of 指很多的.并且是可数名词
复数用have 单数用has
所以选B