1 . Read the sentences and explain why the passive voice is used.
1. A total of 28 men had been selected out of the applicants before Ernest Shackleton set out for Antarctica.
2. It is said that South Georgia had never been crossed by explorers on foot before Shackleton and his men’s expedition.
3. On 17 January 1915, the Endurance got stuck in ice. A lot of efforts were being made to solve the problem when the ice melted and the ship suddenly broke in half.