—Can I see the headmaster at the moment, please?

—I'm afraid not. He _________out. He _________ in 10 minutes.[ ]

A. goes; comes            

B. gone, came  

C. will go; will come        

D. has gone; will come back

驾驶机动车通过经常发生塌方、泥石流的山区地段，要停车观察低速通过。