选出所给单词划线部分读音与众不同的一项.

her books are not under the chair;are her books under the chair?no,they aren't.yes,they are.
lily is not in class 7.is lily in class no,she isx't.yes,she is.
i do not have an english dictionary.do you have an english dictionary?no ,i'm not,yes,i am.
helen dosen't have a blue hat.dose helen have a blue hat?no,she dosen't,yes,she dose.
they do not have a basketball.do they have a basketball?no ,they don't,yes ,they do