把下列比喻句补充完整.
1、秋天,树叶在风中飘落,像______________________________.
2、榕树可真大呀,像______________________________.
3、夜空中无数颗闪亮的星星就像______________________________.
4、秋天到了,草儿都枯黄了,就像给大地______________________________.