They ______ the train until it disappeared in the distance.

I don’t know why she suggested that we _____ the workbefore dark.

Did you know more about the mine accident—Oh，sorry，I had no idea. I ________ the Rescue Center now.

arrived at the Wuguang train station twentyminutes ago, but the train to Guangzhou ____________ yet.

What do you think of the programme Running Man—I think it is very fun， and it is worth .