The national table tennis team hard to win honor for China these years.

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问题 The national table tennis team hard to win honor for China these years.

选项 A、work
B、are working
C、has been working
D、has worked

答案C

解析 根据句中的“these years”可知,句子表示从过去某时开始一直持续到现在的动作,并且还将持续下去。所以应该用现在完成进行时。故选C。
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