【单选题】To swim across the English Channel takes at least nine hours. It's a hard work and it makes you short of breath. To fly over the Channel takes only twenty minutes (as long as you're not held up at the...
A.
Swimming across the Channel takes less than four hours.
B.
The idea of a Channel tunnel or bridge is a very new one.
C.
It is considered to be more difficult to swim across the channel than any other means.
D.
A tunnel or bridge would only reach as far as the coast.