英语 高二 填空题 标准 ★ 精品

描述观察与发现的常用表达 — 英语填空题

外研社版·英语(高中) Unit 5 Revealing nature AI 三重审校通过

题目
A researcher notices that a desert plant’s leaves fold inward whenever the air becomes dry. Complete the report with a common expression for introducing this observation: ___, the leaves fold inward in dry air.