问题描述：
i'm having a great time visiting my aunt(改为否定句)
how was your vacation,Helen?
A.i was very happy
B.it was pretty good
many of___are young and some are old.
A.they
B.them
C.their
D.theirs
how was your vacation,Helen?
A.i was very happy
B.it was pretty good
many of___are young and some are old.
A.they
B.them
C.their
D.theirs
问题解答：
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