原文如下：

Meet the Islands

Located 86 km north-east of Bougainville in the South Pacific, the Carteret Islands of Papua New Guinea are composed of low-lying islands (71) distributing (distribute) in a horseshoe shape, with a total land area of 0.6 square kilometers and a maximum elevation of 1.5 meters above sea level.

The Carteret Islands are believed (72) to have inhabited (inhabit) for more than one thousand years. Few places are as calm, peaceful and beautiful as the seaside here on a calm day. People are very (73) welcoming (welcome), gentle, and calm. There’s no phone network, shops, computers, roads, cars, or motorbikes. Food is cooked on open fires. People here live sustainably. They don’t overfish or pollute, making no contribution to the warming of our planet. However, they are feeling the consequences of the climate change.

Now, as the land (74) is being swallowed (swallow) by the rising sea, the islanders are faced with an uncertain future. Storms and high tides wash away homes, destroy vegetable gardens and pollute fresh water supplies. The trees on the island are also being impacted by the saltwater. The beach exists (75) where___ fertile soil once did. (76) As the coral and seagrasses die, so do the breeding areas for fish. Many seawalls have been built (77) but  with little success. The islands have gradually become uninhabitable.

The Carteret islanders are labelled as the world’s first official climate-change refugees, as they are forced to abandon their homelands (78) due to food shortages, rising sea levels, sinking shorelines, and the dangers of storms and tides. In front of (79) them is the choice whether to stay and watch the islands shrink and slowly disappear or try to rebuild their community somewhere else. Yet, the relocation is not a move embraced by most, and some are unhappy living away from their home, and have returned after struggling to adapt. On the other hand, relocation will be a great challenge to the preservation of the identity and culture of the Carteret islanders.

The Carteret Islanders’ story illustrates how small island states and coastal communities fall victim (80) to rising sea levels caused by climate change. The Carteret Islanders, with a carbon footprint among the lowest in the world, will be among the first to have to leave their homes because of rising seas caused by emissions from other nations.

72空这里为什么不是to have been inhabited，标准答案给的是to have inhabited