Spring is a beautiful____ of a year. It's from March to ____. A lot of flowers come out. The weather is windy and ____. Spring is the best time to ____trees. I like spring best. ____my birthday is in April. It's on ____18^th . 1 usually have a party ____that day.

初一年4班在全年级广播体操比赛中荣获第一名。你认为，最主要的原因是：（    ）