--Whichshirtis，theredoneortheyellowone？--Theyellowone，ofcourse．It'sonly20dollars．（）A.cheapB.cheaperC.cheapestD.thecheapest
--Which shirt is ________，the red one or the yellow one？
--The yellow one，of course．It's only 20dollars．（ ）
A. cheap
B. cheaper
C. cheapest
D. the cheapest
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