Дамблдор,
I. Open the brackets using the Present Perfect Tense, the Present Perfect Continuous Tense and the Past Perfect Continuous Tense.
1. It
has been snowing because all the cars out of doors are snowed in. -
предложение само по себе неправильное...2.
Has she already finished her laboratory work on chemistry? - Not yet, though she
has been working on it for more than 4 hours.
3. Boris is a 3d year student of the Institute of Priority Technologies of our University. He
has been going TO University for more than 2 years.
4. It was last Monday of October. Some experimenters
had been working out a new device since the first Monday of April.
5. Where is Peter? -Oh, don't disturb him . He
has been reading a very interesting book on the theory of criminal law for about 2 hours.
6. Since 9 a.m. the forensic experts
have been examining carefully a pistol left on the scene of murder. And now it's 4 pm.
7. Toxicologists
have just found some liquids in the flat of the victim of the murder.
8.
Has he already finished his diploma work ? - Not, yet, though he
has been working on it for 4 months.
9. It was some days ago. The scientsits
had been analyzing the problem for about a fortnight.
10. Mary is a 2nd year student of the Institute of Mathematics of our University. She
has been going to University for about 1,5 years.
11. I think that it
has been raining because it is damp and cool in the street.
12. It's 6 pm. What are they doing, I wonder? - oh, they
have been discussing one of the most difficult points in the modern criminalistics: the problem of identifying a criminal by his (her) voice since 2 pm.
13. Since 10 am they
have been comparing scratches left on bullets. And now its 5 p.m.
14. Toxicologists
have already found some illegal drugs inside the case of a suspect.
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