Oraciones con a, an en ingles?

Con an :

The car was travelling at one hundred kilometres an hour.

This is an answer that has to be chosen as the best.

He is reading an unusually long book.

Are you going to send him an e - mail?

The toy is missing an arm.

Momy, I want an Omelette.

I want to buy an apple.

I want to be an architect.

An elephant died.

I want an oil.

Con a :

You saw this house has a broken window.

Tomorrow I'm going to buy a cell phone.

I have a book with many pages.

Can you lend me a calculator?

Could I have a glass of water?

I need to buy a new computer.

Look, a newborn baby.

I'm looking for a pen.

Mom, I want a dog.

I stole a candy.