Are you going to Beijing _____ plane? —No. I’m going there _____ a train. It takes only four hours.[ ]

The twins are so much alike that it is difficult to tell one from________.

His father promised _________ him to visit the museum.

Is your new team-mate a good guy?— Yes. He is kind, skillful, hard-working and intelligent; ____, I can’t speak too highly of him.

__________________you met the Englishman?