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

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

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.

A hotel is a place that people stay when they're on holiday.

A hotel is a place which people stay when they're on holiday.

A hotel is a place, where people stay when they're on holiday.

A hotel is a place where people stay when they're on holiday.

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.

There is ecological balance due to the flora and fauna.

Thanks to the flora and fauna, there is ecological balance on Earth.

Earth creates flora and fauna for ecological balance.

The flora and fauna are results of an ecological balance.

Five students who test results are excellent will be awarded a present.

Five students whose test results are excellent will be awarded a present.

Five students whom test results are excellent will be awarded a present.

Five students which test results are excellent will be awarded a present.