考满分 ielts

C8 - Test03- Passage3 - HOW DOES THE BIOLOGICAL CLOCK TICK?

IELTS Academic Reading

Time: 20 minutes

INSTRUCTIONS TO CANDIDATES

Answer all the questions.
You can change your answers at any time during the test.

INSTRUCTIONS TO CANDIDATES

There are 14 questions in this test.
Each question carries one mark.
The test clock will show you how long have you taken.

Do not click 'Start test' until you are ready.

Start test