(单选题)
Over the past several decades, governments at all levels ______ no efforts to improve people’s living condition.
A.spare
B.spared
C.has spared
D.have spared
参考答案:D
知识点:
(单选题)
Over the past several decades, governments at all levels ______ no efforts to improve people’s living condition.
A.spare
B.spared
C.has spared
D.have spared
参考答案:D
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