We use the (a)   , to stop the bicycle.

Without the (a)   , the rim would break.

(you have the rim in the picture)

Guess my name!

(a)  

Guess my name!

(a)  

The (a)   help you go faster.

Guess my name!

(a)  

You must buy a (a)   if you don't want someone else steals your bike.

Guess my name!

(a)