The best time for bird-watching in Nova Scotia is______.

A．He expected it would rain.
B．He likes raining.
C．He feels extremely surprised as it mills.
D．He feels excited when it rains.

A．The difference between classical music and rock music.
B．Why classical music is popular with math students.
C．The effects of music on the results of math tests.
D．How to improve your reasoning ability.