Write the correct word.

1. Do you know who invented / discovered the planet Mars?

2. The number of people dying of malaria has run / decreased enormously over the last 100 years.

3. You need at least three people to operate / estimate this machine safely.

4. Modern technology / equipment makes all our lives easier.

5. We’ve done a lot of research / experiment into why people are scared of spiders.

6. I’m using a computer research / program that translates from English into Greek.

7. This drug seems to have no effect / lack on humans at all.

8. The experiment just involves / operates answering a few questions.

9. Could you program / estimate how many times a week you eat cheese?

10. Do you think anyone will ever invent / discover a time machine?

11. Professor Reinhart decreases / runs the computer lab with her three assistants.

12. There's a lack / an effect of phones in this office. We need some more!