动物及动作词汇：bee, fly, work等 — 英语填空题

读一读，从方框中选词并用其正确形式填空（每词限用一次）：fly / work / bee / bird 1. The ___ is a small insect (昆虫). It can make honey (蜂蜜). 2. The bird can ___ in the sky. 3. Bees are very busy. They ___ hard every day. 4. A ___ can sing in the tree. It is not an insect.