Tim since he lost his job three weeks ago.A. had been unemployedB. was unemployedC. has be

单选题 从成分、功能方面将细胞器进行归类，错误的是A.能产生水的细胞器有线粒体、核糖体和叶绿体等B.可以产生［H］和ATP的细胞器是线粒体和叶绿体C.能发生碱基互补配对的细胞器不止一种，如线粒体、内质网和核糖体D.植物细胞可能含有色素的细胞器有叶绿体、液泡等

C解析能发生碱基互补配对的细胞器不止一种，如线粒体、叶绿体、核糖体。而内质网不能。C错误。

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A. had been unemployedB. was unemployed(答案→)C. has been unemployedD. has unemployed解析：考查时态。根据句中时间状语since he lost his job three weeks ago.，可知用现在完成时。根据句意用其被动形式。句意：自从Tim三个周前失业以来还没有被雇佣。