There are only ten minutes left; can we walk ___________?

 In fact she was _____ of softball, tennis and track.

 The work was difficult, but Tom’s          expression showed that he would finish it in time.

The students were ________ over the ________ problem，listening to the teacher with a ________ expression on their faces.

With April 18’s railway speedup, highway and air transport will have to compete with ________ service for passengers.