◎ 题干
By now, more than 100 photos ________ back to the earth by Chang’e-3.
A.had been sentB.has been sentC.have been sentD.will be sent
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“By now, more than 100 photos ________ back to the earth by Chang’e-3.A.had been sentB.has been sentC.have been sentD.will be sent…”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。