7.那是你的阿姨吗?（翻译,变复数）:Is that your aunt?Are those your aunts?
8.这些是英语词典.（翻译,变单数）:These are English dictionaries.This is an English dictionary.
9.那些是橡皮.（翻译,对橡皮提问）:Those are erasers.What are these?
10.我有许多棒球.（翻译,用汤姆改写）:I have many baseballs.Tom has many baseballs.
这应该是七年级英语!