Those are_____pens.A.my sisterB.my sistersC.my sister'sD.my sisters's

问题描述:

Those are_____pens.
A.my sister
B.my sisters
C.my sister's
D.my sisters's

C对
名词的所有格,单数的在后面加's,复数以s结尾的加',如果D是my sisters' ,那么也对.