by wind/by water/by animals 等表达 — 英语词汇题
题目
根据句意和中文提示，补全单词首字母：1. The coconut falls into the river and travels by w______（水）. 2. Dandelion seeds are light, so they travel by w______（风）. 3. Some seeds stick to the fur of dogs, so they travel by a______（动物）. 4. Birds eat berries and carry the seeds far away, so the seeds travel by b______（鸟）.