______she arrives, we can start.

A.　　  Once　　    　　　　　　   　　　　　　  

B.　　  Though

C.　　  Until　　　　 　　　　　　   　　　　　　  

D.　　 Before

A.　　  Once　　    　　　　　　   　　　　　　  

B.　　  Though

C.　　  Until　　　　 　　　　　　   　　　　　　  

D.　　 Before

The train arrives in Liverpool at 10 p.m. tonight . The plane I would like to take from there _______by then.

My train arrives in Beijing at eight o’clock tonight. The plane I would like to take from there _______ by then.

My train arrives in Beijing at eight o’clock tonight. The plane I would like to take from there _______ by then.

A．has left           B．will have left       C．will leave          D．had left