Choose the correct linkers

1. They are concerned
   [apart from|not only|besides] about the quality, but
   [in addition| also| as well as] about the duration of the flight. They shouldn't have chosen that cheap airline.
2. [Not only| Apart from | In addition to] MTS, we are the largest mobile network company.
3. [Too|As well as|Also] the quality, we are concerned about the duration of the trip.
4. We were concerned
   [ also|too|in addition to].
5. [Apart from| Not only|In addition to] Sam, everyone was present at the seminar.
6. We discussed training, education
   [too|and|as well] the students' marks.
7. We
   [as well| also|too] spoke about the new project.