Change to plural form
This is a wolf.
These are wolves
We.......... young teachers.
We are young teachers.
I ........ a schoolgirl.
I am a schoolgirl.
Those bears ........ strong.
Those bears are strong.
Jack/ clever/ a/ is/ schoolboy.
Jack is a clever schoolboy.
It ....... a green box.
It is a green box.
That ...... an Indian.
That is an Indian.
