Very little rain fell on Syni. The 81 ______ people have saved every drop they could. 82 ______ but it has never been enough for them. Now Syni has it’s own "water factory", 83 ______ which changes salt water from the sea into fresh one that people can drink. The factory 84 ______ uses a way that spends very little. Right in 85 ______ middle of the town are some long ponds(池) 86 ______ which is only a few inches deep. Over each 87 ______ pond is a tent is made of plastics. 88 ______ The hot sun shines goes through the tents and the heat turns the water into vapor that raises from the ponds. At last the salt 89 ______ left behind. The water becomes safe to drink. 90 ______