Употребите глагол to be в подходящей форме (am, is, are, was,

Употребите глагол to be в подходящей форме (am, is, are, was, were, will/shall be) .
1. In five years they ____ certified specialists.

2. My friend ____ a network manager in a large company some years ago, now he is a lecturer at a financial college.

3. Last year we ____ very busy preparing for tests and exams.

4. There ___ many helpful office application programs today.

5. Computer ____ one of the most wonderful inventions of mankind.