<li>(a)IN the united states, the industrial (b)USE OF plastics (c)IS greater (d)THAN STEEL, alumminum and copper continued. (e)NO ERROR
correct answer: d</li>
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<p>29.The dolls in the collection, (a) ALL (b) MORE THAN two hundred years old, fad been (c) CAREFULLY carved for children (d) LONG SINCE gone. (e) NO ERROR
correct answer:e</p>
<p>(d) "Than that of steel" is correct because you're comparing the use of plastics to the use of steel. You're not comparing the use of plastics to steel.</p>
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<li><p>this is a comparison error. you can't compare the use of plastics to steel. you could compare the use of plastics to the use of steel or plastsics to steel, but not the use to plastics to steel. </p></li>
<li><p>there's no error...</p></li>
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<p>somekidinnyc: Stop being a pain. I mean "obvious, you shouldn't have had any trouble with that." Now, obviously, he/she does have trouble with that. Not everyone knows that grammar rule.</p>