Circle the correct word or phrase

1. Before starting/start investigation, I did not know
what real research was.
2. I am sure that after narrowed/narrowing the topic
of the investigation the research will become more
manageable.
3. Looking/looked through the materials, I noticed
the statistics mismatch with reality.
4. I recorded date and time as well as the process of
my experiment with its result in my log book and,
doing/having done that, I left my laboratory.
5. Having lost/Losing my notes, I couldn't present
the result of the experiment at the discussion.
6. Having been/Being quite intelligent, Tim hoped to
finish his investigation in a month.
7. Having missed/Missing the start of the lecture on
data collection, I decided to learn the topic on my
own.
8. After having/have discussion on the issue, we
came to conclusion that satisfied all ten of us