<span>The excerpt suggests that Johnson’s work is significant because it reflects an exhaustive study of its words.
In the excerpt above, Johnson says that he used many methods in order to compile this dictionary - he read a lot of books, used his experience, and used many analogies for readers to connect words and their meanings on their own. A is incorrect because that's not the point of a dictionary; B is incorrect because he doesn't even mention other dictionaries; D is incorrect because a dictionary cannot only list obscure words.
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Here are the answers to the given question above.
The given word is "begin". The present participle would be beginning. The past form is began, and the past participle is begun. The word begin is one of the irregular verbs. Hope this answers your question. Have a great day!
Time heals all wounds. Possible kindness is rewarded but the former makes more sense to me :)