原题:
题型:单项选择-四个选项
—Mom, I need my schoolbag.
—It’s in your ________, on their bed.
—It’s in your ________, on their bed.
| A.grandparents’ room | B.grandparent’s room |
| C.grandparents’ rooms | D.grandparent’s rooms |
题目考点:名词所有格的用法
