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Sara D. Davis, Associated Press
Duke's Ryan Kelly (34) dives for a loose ball with UNC-Greensboro's David Williams (00) during the first half an NCAA college basketball game in Durham, N.C., Monday, Dec. 19, 2011.

DURHAM, N.C. — Freshman Quinn Cook scored all of his season-high 14 points in the second half, and No. 7 Duke routed UNC Greensboro 90-63 on Monday night.

Mason Plumlee had 15 points and 13 rebounds and Austin Rivers added 14 points for the Blue Devils (10-1). They shot 54 percent from the field, shook off a sluggish start and overcame 18 turnovers to win their third straight since the one-sided loss at No. 2 Ohio State.

Kyle Randall scored 12 points but the Spartans (2-10) shot just 34.5 percent in the second half in losing their seventh straight. The last two have come under interim coach Wes Miller, a former North Carolina guard who took over last week.