The South Pole is a region __________ is not inhabited by humans, except for researchers.

Mrs. Thorne, _________ I met at the conference, gave an excellent presentation.

The exam __________ I failed last year taught me to work harder.

The World Wildlife Fund, __________ mission is to conserve nature, helps protect endangered species.

He met a traveler __________ had been to many countries.

Some park rangers, __________ work with local communities, teach people how to protect nature.

The market ___________ stalls were filled with fresh produce was lively.

Wangari Maathai, __________ started the Green Belt Movement, helped plant many trees in Africa.

The airline, __________ has good reviews, offers free meals during the flight.

Spring, __________ the flowers bloom, is the best time to visit the national park.

She bought a new dress, _________ looked perfect for the party.

The woman __________ leads the campaign for clean water is very passionate about her cause.

The local ranger, __________ takes care of the trails, told us some interesting facts.

The children, _________ were tired after the trip, went straight to bed.

The Earth, __________ is the third planet from the Sun, has many beautiful landscapes.

That artist, _________ work we saw in the gallery, is originally from Spain.

The food chain, __________ is a cycle of eating and being eaten, is very important for nature.

I bought a souvenir from a shop ___________ sells handmade items.

The person ____________ advice I follow helped me improve my pronunciation.

She lost the necklace _________ her grandmother gave her.

The coral reef, which is home to thousands of species, are an important marine ecosystem.

The photographer, that travels around the world, shared amazing stories with us.

The historical figure whom inventions changed the world is celebrated today.

The community whose organises clean-up events is very active.

A diet which includes fresh fruits and vegetables are good for your health.