You got correct answers! Good job
The answer is c. A restatement in your own words; I think of it as a summary. Comes from Greek, meaning to modify the way something is told.
Minimal eye contact would not help establish a strong ethos, as it gives the impression you are not confident in what you are talking about.
Well,
"Chem" is usually capitalized. But I believe it is the short form of the subject, Chemistry.
1d) was designed (long time ago so past tense)
2d) Has been repaired (It is still going on the present, this year)
3c) Had discovered (He discovered America long time ago)
4a) To have worked (worked long ago when he was young)
Hope it helps!
