fivepiecesofcake/fivepiecesofcakes哪个才对?
--Whatwouldyoulike,sir?
--I'dlike____________.
A.twoglassofmilkandfivepieceofcakes
B.twoglassesofmilkandthreesofcake
C.fourglassesofmilkandfivepiecesofcakes
D.fourglassofmilkandfivepieceofcakes
为什么选C?
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