I don’t know when he _______ tomorrow, when he    tomorrow ,I will tell you.

A．will come；come

B．will come；comes

C．will come；will come

D．comes；would come

地锚、岩石锚杆和锁定装置的设计承载能力应为总牵引力的( )。

A．3～5倍

B．5～8倍

C．5～10倍

D．8～10倍