单项选择题

Boys and girls! Let’s talk about the seasons. There are four seasons in a year in our country. March, April and May make up the spring season. June, July and August make up the summer season. September, October and November make up the autumn season. December, January and February make up the winter season.
Near the North Pole (北极) there are two seasons: winter and summer. The winter nights are long. For more than two months you can’t see the sun. The summer days are long. For two months, the sun never sets, and there are no nights.
In the tropics (热带), there are also two seasons: a rainy season and a dry season.
You can’t see the______in summer near the North Pole for two months.

A. sun
B. wind
C. moon