1.I
have
to
go
the
doctor(
on
)Saturday.
2.Can
you
come
to
my
party(
on
)Sunday
afternoon.
3.We
will
go
to
the
movies(
on
)the
evening
of
May,2004.
4.She
gets
up(
at
)7:30(
in
)the
morning(
on
)Sunday.
5.Teachers'
day
is(
on
)September
10th.
on
用于具体某一天,星期,日期前,
in
用于一天中某个阶段,年,月份前.
at
用于具体点时间前
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