Question

The computer.........(be) one of the most important gifts of science. It ......... (have) brought about a revolution in the field of information technology. Mankind......... (be) grateful to its investor who .......... (have) given it this gift. We .......(be) able to reduce the work of hours into the work of minutes.​

Answer 1

Answer:

1. is

2.have.

3. are

4. has

5.are

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