英语 九年级 填空题 简单 ★ 精品

现在完成时 — 英语填空题

人教版·英语(初中) Unit 13 We're trying to save the earth! AI 三重审校通过

题目
用所给动词的适当形式填空:People ______ (throw) away too much rubbish since ten years ago, so the river near our town has become very dirty.