先通读下面短文，掌握其大意，然后从短文后面各题所给的A、B、C、D四个选项中，选出最佳选项。

    The traditional Chinese lunar calendar divides a year into 24 solar terms(节气). The Spring Equinox which is calledchunfenin Chinese usually falls1March 20 or March 21 every year.

    Standing an egg upright is a2game across the country during the Spring Equinox. People practice this tradition to celebrate the3of spring. It is believed that if someone can make the egg stand, he will have good luck in the future. It's also a good time to fly kites. In ancient times，people did not have good medical resources (资源)，4they wrote their medical problems on a paper kite to ask for good health. When the kite was in the air, people would5the line to let the paper kite fly away, which means the lying away of diseases.