It's in/on/under...方位回答 — 英语填空题
题目
情景问答：根据句意填入 in、on 或 under。1. Lucy's pen is ___ the bag. The bag can close with the pen inside. 2. Tom's eraser is ___ the desk. He can see it on the top of the desk. 3. Amy's ruler is ___ the chair. She looks down and finds it on the floor under the chair.