Nowadays many people travel across China ________ high-speed trains.
on behalf of
by means of
at cost of
in terms of
We regret to inform you that there are no tickets ______ for Friday's performance.
Mr.Wang ______ two boys to send the sick boy to the nearest hospital.
My teacher's rich knowledge of science ______ my decision ______ study science.
There is reason to believe that most writers have difficulty in ______ the opening paragraphs of their papers.
When and where will it suit your ______ for our next meeting,Mr.Brown?