[填空题]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