QWhat's he/she going to do on vacation?
AHe's/She's going to take a boat ride.
QWhen is he/she going to take a boat ride?
AHe's/She's going to take a boat ride tomorrow.
QWhat's he/she going to take with him/her?
AHe's/She's going to take a swimsuit.
QHow's he/she going to get to the department store?
AHe's/She's going to take a taxi.
QHow are they going to get to the department store?
AThey're going to take a taxi.
QWhat's he going to do on vacation?
AHe's going to go on a bus tour.
QWhat's she going to do on vacation?
AShe's going to see a show.
QWhat are they going to do on vacation?
AThey're going to stay in a hotel.