<p>1.
Howar Gardner, an --OBSERVER OF-- chinese elementary education, has questioned the view that requiring young children–TO COPY-- models --PREVENTS-- them from becoming-- A CREATIVE ARTIST-- later in life. NO ERROR.</p>
<p>2.
ALTHOUGH the new device was the most --CLEVER --designed bird feeder that Ms Rodriguez had --EVER OWNED–, it could not keep squirrels–FROM-- stealing the birdseed. NO ERROR.</p>
<li>
CONSTRASTING WITH --MOST OTHER-- fifteent-century rulers, Portugese kings --COULD COUNT ON-- the support of the aristocracy --IN ANY-- overseas ventures. NO ERROR</li>
</ol>
<ol>
<li>A CREATIVE ARTIST is wrong, should be CREATIVE ARTISTS</li>
<li>CLEVER is wrong, should be CLEVERLY</li>
<li>CONTRASTING WITH is gramatically incorrect? --> not sure on this one, that's what i would put</li>
</ol>
<p>'contrasting with' is wrong because it just isn't supposed to be used that way. 'in contrast to' is how it's used, some idiomatic expression thing according to PR</p>
<p>I'm not sure about this but I think it has something to do with the fact that "contrasting with" is a verb phrase and "in contrast with" is a prepositional phrase. Either that, or that "contrasting with" is normally used as a gerund phrase (verb phrase that acts like a noun)</p>