Nowadays many people travel across China ________ high-speed trains.
on behalf of
by means of
at cost of
in terms of
All that day my father was in as he had lost his wallet.
The police are offering a big for the information about that traffic accident.
While the children were listening to their teacher’s joke, they were shouting .
He his hand and __ _ to report his answers when asked to.
As I pulled the sheet out of the typewriter, it .