that documentary is boring{改为复数句
that documentary is boring{改为复数句
That is ruler改为复数句
That is an egg 改为复数句
That is her brother.(改为复数句)
That is my dictionary 改为复数句
Is that your baseball 改为复数句
that is his brother 改为复数句
that is his pencil改为复数句
is that her toy改为复数句
that is my eraser 改为复数句
is that an elephant?改为复数句..
that is an orange.改为复数句