4) Because of the delay, lunch __________ (give) to all the passengers in 10 minutes.

В данном предложении необходимо вставить глагол в форме пассивного залога.

Because of the delay, lunch (будет дан) to all the passengers in 10 minutes.

Ответ: Because of the delay, lunch will be given to all the passengers in 10 minutes.