—Those scientists invented a robot to care for kids! —It’s not surprising.They ____ wonders all the time.
A.worked
B.were working
C.work
D.have been working
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◎ 知识点
根据n多题专家分析,试题“—Those scientists invented a robot to care for kids! —It’s not surprising.They ____ wonders all the time.A.workedB.were workingC.workD.have been working…”主要考查了你对 【一般现在时】,【将来进行时】,【过去完成进行时】,【过去将来时的被动语态】 等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。
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