七选五填空。根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
You’re probably most familiar with college dictionaries, often called abridged dictionaries. Although abridged means ―shortened, these dictionaries contain more than 150,000 entries and provide detailed definitions that are sufficient for most college students and general users.
16.__________.Webster’s Ⅱ New Riverside University Dictionary and the American Heritage Dictionary of the English Language are college dictionaries.
