[填空题]{{B}}Seven Types of Evidence{{/B}} It is important to learn to use evidence in argumentative writing, because without evidence, you can’t persuade anybody of anything. Usually seven types of evidence are used. {{B}}Ⅰ. Expert Testimony{{/B}} Expert testimony is useful because it comes from somebody with special knowledge and has been tested by others. There are three kinds of expert testimony: facts, informed opinions, and {{U}} 1 {{/U}}. 1. ______. The first two can be safely used in your writing, but the third may be dangerous, because they are just what is possibly tree. {{B}}Ⅱ.{{/B}} {{U}} 2 {{/U}} 2. ______. This refers to data that can reveal some information. Strong evidence of this type should be valid, accurate, and {{U}} 3 {{/U}}.