Английский язык. Ч.3 (Units 9,10). Ильичева Н.А - 49 стр.

Revision


21. Choose the correct answer.
1. The Empire State Building … by lightning, on average, more that twenty
   times a year.
 a) strikes;                  b) is striking;              c) is struck.
2. The Sun … the light by which we see objects in our solar system.
 a) provides;                 b) has provided;            c) is providing.
3. One of the first ways in which metals and nonmetals … was by their chemical
   properties.
  a) are distinguished;      b) were distinguished;    c) had been distinguished.
4. If you …. in such a hurry, you wouldn’t have forgotten the file.
  a) didn’t leave;             b) haven’t left;            c) hadn’t left.
5. The Earth and the Moon are both believed … at about the same time.
  a) to originate;             b) to be originated;        c) to have originated.
6. You will miss the bus if you … now.
  a) won’t leave;              b) don’t leave;             c) haven’t left.
7. If the temperature rises above 0 °C, ice …
 a) melts;                     b) might melt;               c) would melt.
8. Our knowledge of the most basic nature of stars … possible through our study
   of the atomic nucleus.
 a) has made;                 b) made;                     c) has been made.
9. We … the problem for quite a long time.
 a) discuss;                 b) are discussing;          c) have been discussing.
10. He denied … in the experiment.
 a) to have taken part;       b) taking part;              c) to take part.




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