问题描述：
1道英语单选.-What are on show in the museum? -Some photos _ by the children of Yushu,Qinghai. ...
1道英语单选.-What are on show in the museum? -Some photos _ by the children of Yushu,Qinghai. A.have been taken B.were taken C.are taken D.taken 麻烦告诉我理由
1道英语单选.-What are on show in the museum? -Some photos _ by the children of Yushu,Qinghai. A.have been taken B.were taken C.are taken D.taken 麻烦告诉我理由
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