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_____the news be true?

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_____we have dinner?

My brother was very ill, So I_______call the doctor in the middle of night.

May I take the book out?No, you _________________.

混凝土管管道连接一般采用（）。

A. 焊接连接
B. 承插连接
C. 套管连接
D. 机械连接