Passive Voice

Complete the passive unreal conditional sentences. Use the correct form of the verb in parentheses.

1. If human cloning (permit)__________, so much could be learned about human genetics.
2. If genetically engineered crops (not / develop) _____________in the past, farming would be more difficult and groceries more expensive today.
3. If computer chip implants (place)_____________in each person, we would lose privacy.
4. If remote surgery (support)_____________today, doctors could reach more people in need.
5. If artificial intelligence (apply)_______________to cars built now, driving could be a lot easier.
6. If the vaccine _____________________(not / discover), many more people would have died.
7. If cars (not / become)___________so commonly used, people would probably walk more and be more fit.
8. If space tourism (see)________as the next big thing in the travel industry, many people would invest in it.
9. If the telescope (not / invent)___________in the nineteenth century, space exploration may not have been pursued as soon.
10. If only renewable resources (use)_________from now on, the environment would be much better protected.












Answers:
1. Were permitted
2. Hadn’t been developed
3. Were placed
4. Were supported
5. Were applied
6. Had not been discovered
7. Had not become
8. Were seen
9. Had not been invented
10. Were used