一般过去时描述观察经历 — 英语词汇题
题目
用所给词的适当形式填空,描述一次自然观察经历。1. Last Sunday, we o______ (观察,observe) some birds in the forest. 2. I n______ (注意到,notice) a beautiful butterfly on the flower yesterday. 3. She d______ (发现,discover) a little frog near the pond last week.