relative clauses

The smartphone is an invention ________ has made people's lives easier than before.

• who

• that

My English teacher is a person __________ really encourages me to work hard.

• which

• who

The room _________ I study is always cool in the summer.

• which

• where

A cassette recorder is something ________ you don’t see very often these days

• which

• where

The children ________ live in my apartment block are very polite.

• which

• that

The woman ________ found my wallet gave it to the police.

• who

• which

We visited one town _______most of the buildings were new

• that

• where

The map ______ we had was very easy to use.

• that

• where

I think the food _______ we ate last night was Mexican.

• which

• who

Nelson Mandela was one of the greatest men _______ ever lived.

• that

• which