The car alarm _____ went off ten minutes ago is still on

• where

• which

• who

• where

The Moon, _____ diameter is only a fourth of the Earth, is the only natural satellite of the Earth

• whose

• none

• who

• where

He panicked when he couldn't find the key in his pocket _____ he always kept it

• that

• who

• which

• where

We hired a new engineer _____ worked for a big electronics company for years.

• that

• who

• which

• none

Newton made his discoveries during a time _____ humans didn't know much about sciences.

• none

• whom

• which

• when

Over there we can see a mother __ is wearing a pink dress.

• who

• whose

• where

• when

Scientists are still trying to find the reasons _____ tornados and hurricanes form.

• why

• whose

• where

• when

Ants are small insects___ live in big groups.

• who

• whose

• which / that

• whom

The patient, ___had a serious disease, was taken to hospital immediately.

• who

• whose

• which

• why

We arrived at a nice beach, ___we could swim and lie on the sun.

• who

• where

• which

• that