Mumbai is a city (a)   millions of people live.

I can't find the place (a)   I left my like.

A butcher is a person (a)   sells meat.

The students (a)   stay in P4 Caring and P4 Gentle are very friendly.

I have a friend (a)   is very good at repairing cars.

An aeroplane is a machine (a)   flies.

I like those biscuits (a)   have chocolate on top.

I'm listening to the CD (a)   that you gave me.

London was the place (a)   the 2012 Summer Olympics was held.