山冈上生长着一片松林。可是,不知因为什么,很多松树枝不繁叶不茂,全然没有那种蓬勃向上的气势。一天,一群啄木鸟飞过这片松林的上空,飞累了,到松林里歇息一下,顺便找点食物填饱肚子。它们惊喜地发现,几乎每棵松树上都有很多虫子,有些虫子还藏在树皮下面。一只啄木鸟有礼貌地说:“松树朋友,你们身上有很多虫子,让我们帮你们灭虫吧!我们 A pine forest grows on the hill. However, I do not know because of what, many pine branches are not leafy, completely without the kind of vigorous momentum. One day, a group of woodpeckers flew over the pine forest, flying tired, to the pine forest to rest for a while, find the way to fill the stomach. They were pleasantly surprised to find that almost every pine tree had many bugs and some bugs were hidden under the bark. A woodpecker politely said: ”Pine friends, you have a lot of bugs, let us help you pest! We