高等继续教育 / 电子商务英语
正确率：100%
题型描述: 单选题
This book must ＿＿＿＿＿＿ _ next summer.
A.have been published
B.have published
C.publish
D.be published
This book must ＿＿＿＿＿＿ _ next summer.
A.have been published
B.have published
C.publish
D.be published
参考答案：
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