阅读理解。 Can we live without salt? No, salt is very important to us, we need salt in our food. Animals need it, too. Most of the salt in our country comes from the sea. People dig very big pools and let sea water in. When the sun dries up the water, people can get salt from the ground. The salt is white, clean and beautiful. There are a lot of salt wells (井) in Sichuan. A salt well in much like a water well. People bring the well water up to the ground and then dry it in big jars over fire. In this way, they get salt. We can also get salt from salt mines (矿). A salt mine may be found under the ground. Some years ago, people in Jiangxi found a big salt mine and soon opened it. People there don't need salt from other places any more. In the northwest of our country, there are many salt lakes. Some of these lakes are very big. The salt even in one big lake will be enough for our people for centuries. 1. We can't live without salt, so . [     ] A. we need it, too B. it is very important to us C. animals need it, too D. there is salt in all our food 2. We get most of the salt from . [     ] A. salt lakes B. sea water C. salt wells D. salt mines 3. Not long ago, a big salt mine was found and opened . [     ] A. in Sichuan B. in Jiangxi C. in the northwest D. beside these 4. The best title for this article is . [     ] A. Salt B. Why We Need Salt C. Salt Is Important D. We Need Salt