Insert the suitable from of the verb. you....a doctor. they...students. we arent singers,...we? she....a cook. it....a nice big dog. that....a good idea.
i.....a librarian,but my sister.....nurses.these boys ....pupils.
You are a doctor; they arestudents; we are singers, are we?; she is a cook; it is a nice big dog; that is a good idea; i am a librarian, but my sister is nurses; these boys are pupils.