改成复数形式．1．Is that a bus?2.What's thia?It's a box.3.Where is the pen?It's in the desk.
问题描述：
改成复数形式．1．Is that a bus?2.What's thia?It's a box.3.Where is the pen?It's in the desk.
答
Are those buses?
What are these?
They're boxes.
Where are the pens?
They're in the desk.
放心...