填空题
New Zealand is famous for its agriculture. Most of the exports come from the farms. Yet only about 10% of the labor force work in agriculture, 25% of the labor force work in factories. Today the (11) make clothes and shoes and a number of other consumer goods. Most of the (12) machinery has to be imported. Mining is not (13) , but New Zealand has plenty of power. 85% of the electricity is produced by water. There is a lot of rain during the year, and there are many (14) and fast rivers in the mountains. Water power is cheaper than power from coal or oil New Zealanders (15) have the cheapest electricity in the world.
Choose the right word to fill in the following essay corresponds to the air（）