Bonjour,
a) The District line serves the biggest number of stations.
b) The Bakerloo line is more recent.
c) There are more people at 7 p.m than at 11 p.m.
Ou tu peux inverser les heures si tu veux : There are more people at 11 p.m than at 7 p.m.
d) Ron plays chess better than Harry.
