单项选择题A.The train will stop automatically if no signal is sent from the command spot.B.Most of the control work is done by computers not by human beings.C.It’s very safe to travel on the Victoria Line.D.Accidents occasionally happen on the Victoria Line.
单项选择题A.He has to work with his brother.B.He has no definite plans.C.He usually works on weekends.D.His plan depends on the woman.