Choose the sentence A, B, C or D that is closest in meaning to the original sentence.

Every astronaut has to experience some training. The training is really hard.

There is only liquid water on Earth.

Earth is the planet with liquid water only.

The only planet with liquid water is Earth.

Earth is much covered with liquid water.

The world's longest river is the Amazon River, which flows through South America.

South America is the largest river in the world, which flows through Amazon.

The Amazon River, which is also called South America, is the largest river in the world.

The Amazon River, which flows through South America, is the world's largest river.

He is very tired because he wasn't slept well.

He was very tired because he hadn't slept well.

He has been very tired because he wasn't sleeping well.

He is very tired because he has slept well.

Plants and animals need water bodies and landforms for their habitats.

Essential habitats for plants and animals create water bodies and landforms.

Water bodies and landforms cover all living habitats.

Water bodies and landforms need plants and animals.

Humans often use land for farming and housing.

Natural habitats are also land for farming and housing.

Humans have always used living habitats to farm.

Natural habitats are often used for farming and housing.

Ice and water in the Arctic Ocean are for polar bears.

Habitats for polar bears is ice water.

The Arctic Ocean makes up habitats for animals like polar bears.

The habitats for polar bears are Arctic Ocean ice and water.

The Sahara, which is the largest hot desert, covers much of North Africa.

North Africa is the largest hot desert, which covers the Sahara.

The Sahara and North Africa are the two hottest deserts in the world.

No desert is hotter than North Africa, which is located in the Sahara.