Jupiter______perhaps the most important planet of the solar system.

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问题 Jupiter______perhaps the most important planet of the solar system.

选项 A、was
B、were
C、is
D、will be

答案C

解析 结构识别这是最基本的S+V十P(主系表结构),此处缺少系动词,因主语是第三人称单数,所以答案为C。
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