把下列句子改成单数句或复数句
问题描述：
把下列句子改成单数句或复数句
1.This is a tiger.
2.Those are eggs.
3.Is it a bottle?
4.Are these mice?
5.There is a sheep on the hill.
答
1.These are tigers.
2.This is a egg.
3.Are they bottles?
4.Is this mouse?
5.There are sheep on the hill.