Complete the key phrases. Then look at the model text and check your answers

1. We never SMOKE cigarettes at any time. John always SMOKES a pipe but we PREFER cigars. 2. My wife's mother HAS BEEN LIVING with us for the last six months. 3. She IS GOING AWAY today. My wife IS HELPING her with
her packing now. 4. The boys HAVE BEEN EATING green apples all day.
Now they ARE ill, and their mother IS TALKING to the doctor on the phone.
5. The boys HAVE GONE to bed because they are ill. The doctor  HAVE prescribeD some medicine. Their mother IS GIVING them some now. 6. My brother usually VISITS his business friends two or three times a year. He
IS TRAVELLING in Germany at present. 7. She HAS READ many books on astronomy and so she really KNOWS the subject. 8.1 HAVE BEEN LISTENING to you for twenty minutes but I HAVEN'T understOOD anything.
People usually THINK first and SPEAK afterwards. 9. Peter HAS BEEN DRIVING a car for years but he HAS never driveN at night before. 10. John IS goING out).  He HAS just PUT  his coat on. 11. Peter HAS BEEN readING
in bad light and now he IS havING a headache. 12. Our train usually LEAVES at two o'clock. Father HAS BEEN traveLLING by that train every Friday for five years. 13. Look out of the window.IS IT RAINING? I hope not as I HAVE not BROUGHT a raincoat today.

1) Organs and organ systems of any living organism are constantly functioning.

2) This group of researchers recently made an interesting scientific discovery.

3) A new medication burns fat fast.

4) Living cells are able to generate movement.

5) You can observe the direction of movement of particles with the help of a new generation of devices.

6) You can measure the strength of muscle contractions with this device.

7) Movement is one of the main properties of life.

8) You must follow the direction of movement of the experimental animal.

9) Scientific research includes a hypothesis, experiment and conclusions.

10) Each muscle cell contains a protein molecule.