（题文）So far a series of problems ________ brought about by this decision.A．haveB．_刷题宝

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（题文）So far a series of problems ________ brought about by this decision.

A．have	B．has
C．have been	D．has been

上一题下一题 0.85难度单项选择更新时间:2018-09-03 04:33:48

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