英语 五年级 填空题 较难

描述原因的简单表达 — 英语填空题

闽教版·英语 Unit 6 Feelings AI 三重审校通过

题目
Read and fill in the blanks. 根据情境填空:Yesterday evening, Mike couldn't find his storybook. So this morning he looks sad ___ he lost his book. His friend Lily gives him a new one. Now Mike is very ___ because he can read it again.(第二空填情绪词)