Defining relative clauses

The icecream ....... we ate last night was chocolate and cream.

That's the house ...... my family used to live.

I know a lot of people ....... first language is not Spanish.

Christmas is the time ...... people buy and receive presents.

My best friend is the girl ...... lives next door.

CAN THE RELATIVE PRONOUN BE OMITTED?

I haven't received the letter which you sent me.

• YES

• NO

CAN THE RELATIVE PRONOUN BE OMITTED?

Harry Potter is the boy whose parents were killed by Lord Voldemort.

• YES

• NO

CAN THE RELATIVE PRONOUN BE OMITTED?

I didn't recognize the person who phoned last night.

• YES

• NO

A person who is gifted...

• has given someone a lot of presents.

• has received a lot of gifts from someone.

• has a special skill or talent at something.

I don't trust people ..... consider themselves natural leaders.

• WHO

• WHICH

• WHOSE

• WHERE