Choose the right variant (a, b, c or d)
1. It is necessary … an account of his work.
a) his writing c) that he will write
b) for him to write d) in order that he writes
2. The evidence … points to the existence of a common mechanism for these changes.
a) presenting................ c) present
b) presented d) are presented
3. I am not sure … he knows anything about quantum mechanics.
a) whether............ c) or
b) does d) about
4. Although much has become known about the details of the genetic code, the problem is still far from … .
a) solving c) being solved
b) having solved d) be solving
5. The samples are supposed … using the new technique.
a) being analysed c) to be analysed
b) to analyse d) analyzing
6. We will be able to control this process if we … its nature.
a) understand c) have been understood
b) will understand d) understood
7. It was known as early as in the 19th century that the earth … by a magnetic belt.
a) has surrounded c) had been surrounded
b) would be surrounded d) was surrounded
8. I could give an unprepared talk in English if it … my work.
a) will concern c) would concern
b) concerned d) had concerned
9. The problem … at the next staff meeting is of vital importance.
a) considered c) considering
b) having considered d) to be considered
10. This man … in charge of our research group for a few years now.
a) has been...... c) was
b) is d) has to be
11. I expect some interesting facts … at our next conference.
a) are to report c) will have reported
b) will be reported d) will report
12. L. Landau … the conception of energy density matrix in 1927.
a) was introducing c) introduced
b) has introduced d) was introduced
13. I … his lecture last week but I came too late.
a) could have heard c) was able to hear
b) could hear d) have heard
14. He … to describe all the work but only present the important data.
a) hadn’t... c) shouldn’t
b) wouldn't d) didn't have
15. Your reception room is bigger than ...
a) our c) we
b) ours d) us
16. We hadn't heard from him for a long time. He ... wrote nor telephoned.
a) either c) neither
b) nor d) didn't
17. We heard him ... this story yesterday.
a) to tell c) tell
b) told d) has told
18. What would you write about if you ... to write a popular science article?
a) were c) had been
b) would d) was
19. When ... to ionizing radiation, living cells cannot perform their normal functions.
a) exposed c) have exposed
b) exposing d) expose
20. Would you mind ... me a copy of your conference paper?
a) having sent c) to send
b) sending d) sent