My friend 2.1. _______ took me to a restaurant works in

My friend 2.1. _______ took me to a restaurant works in a big shop 2.2. ________ is in the centre of the city. The restaurant 2.3. _______ we had lunch was very modern. The food 2.4.________ they served was excellent. The waiters 2.5. ________ shirts were silk were always busy with the customers.
2.1 A) whoseB) whichC) who
2.2 A) which B) where C) who
2.3 A) which B) where C) who
2.4 A) which B) where C) who
2.5 A) which B) where C) whose