选择合适的单词补全短文。 summer, swimming, sunny, visit, skate, spring, green, swim, plant trees, winter, blue The best time to go to Beijing is fall. It's ____________ and cool. You can go to the Great Wall. When is the best time to go to Harbin? Of course ____________. It's windy and cold. But you can ____________ there. ____________ is the best season to go to Sanya. It's sunny and hot. You can ____________ in the sea. What about Hangzhou? __________ is the best time to go there. The sky is __________. The leaves are __________. It's beautiful. You can ____________, too.