单位作品要具备的条件是（）。
A.单位主持完成
B.单位意志创作
C.单位承担责任
D.单位亲自开发
E.与业务有关
参考答案：A, B, C
This is the train ____ we went to Shanghai. [ ]
A. on which
B. by that
C. by which
D. on that
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