C. The tree was planted by Mary.
http://wiki.answers.com/Q/Which_sentence_uses_the_passi...
・ 1 Identify passive sentences. Look for passive voice in the construction "to be" followed by a past participle... ・ 2 Evaluate the sentence. Not all passive sentences need revision, but many do. Ask if the meaning of... ・ 3 Revi...
http://www.ehow.com/how_4517115_avoid-passive-voice.htm...
"John drew the picture" - Active voice "The picture was drawn by John" - Passive voice
http://wiki.answers.com/Q/What_is_an_example_of_passive...
In the Sciences, the use of the passive voice is appropriate to emphasize the receiver of the action or to minimize the importance of the agent. Further, in scientific writing, the passive voice puts the emphasis on the experiment or proces...
http://writingcenter.gmu.edu/resources-template.php?id=...
Most of us have our first, formative writing experiences in school, where we learn to use the passive voice to put the emphasis on the facts we’re conveying rather than on ourselves. But when we begin to write fiction, passive voice becomes...
http://bookmarket.ning.com/profiles/blogs/top-nine-char...
English teachers tell kids to avoid the passive voice because it's flaccid and indirect. Things happen; they're not done. Things are said; nobody says them. Nobody's home in the passive. Nobody takes any responsibility for anything in the p...
http://www.counterpunch.org/jackson08042003.html
For one thing, the passive construction is always more "wordy" than the active construction. (Notice the examples above.) Also, the passive construction takes emphasis away from whatever is being described or from whatever is perf...
http://www2.ivcc.edu/rambo/eng1001/eng1001_words.htm