Read this student essay about the crop circles in Britain and elsewhere. There are 15 mistakes in the use of the passive. The first one is already corrected. Find and correct 14 more.

The Crop Circles

In our day,  we believed in science and have the feeling that every question can be explain and every problem can be solved. But some of us want the opposite. We don't want everything to be explained. We like puzzles. We feel that mystery is needing in our lives.

The mysterious crop circles that have been appeared around the world in the last 25 years or so are an example of this. These formations have reported in more than 20 countries, including the United States, Canada, and Australia. But most of them have been finding in grain fields in southern England. These circles, which are large and flat, are caused by a force that flattens the grain but does not destroy it. They are still been made.

How have these circles produced? By whom have they been made? Since the first discovery of the circles, many explanations have been proposed. According to some people, the circles has been made by spirit creatures like fairies. Others say they have been causing by "Star Wars" experiments or are messages that been left by extraterrestrials visiting our planet. Two British painters, David Chorley and Douglas Bower, say they were made the crop circles over a period of years as a joke. If this is true, however, how can we explain the crop circles in Australia and Canada and other places? They couldn't all have being made by Chorley and Bower, could they?

In 2002, director M. Night Shyamalan released his movie Signs, which is about the crop circle question. The movie shows clearly that the crop circles made by invading aliens from beyond our solar system. This is one interesting and enjoyable theory. More explanations like it get needed. What's fun is speculation. The mystery doesn't need to be solved.