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
根据句意,用括号内动词的现在进行时形式填空。
1. Look! The workers ______ (pick) up rubbish in the park.
2. Listen! The students ______ (talk) about how to save the sharks.
3. Be quiet! The scientists ______ (test) the water in the river.