English schoolboys often show the sense of sportsmanship to a（）high degree in their relations with each other.

单项选择题There are now（）methods for studying color vision in infants than there once were.

A．more sophisticated than
B．much more sophisticated
C．much sophisticated
D．sophisticated

单项选择题This pair of shoes isn't good, but that pair is（）better.

A．rather
B．over
C．hardly
D．less