Помогите с Английским

Выберите нужную форму (положительную или отрицательную). 
1) A cheetah is / isn’t the fastest animal in the world.
2) Parrots are / aren’t reptiles.
3) The Pacific Ocean is / isn’t between Antarctic and Africa.
4) Moscow is / isn’t in Canada.
5) Chihuahua is / isn’t a little dog.
6) I am / am not a student.
7) Lima is / isn’t a capital of Peru.
8) Chamomile petals are / aren’t usually white.
9) Aztecs are / aren’t from Mexico.
10) These exercises are / aren’t difficult. JJJ
11) Right now I am / am not nervous. JJJ