Teacher is often ___ the classroom.onofup and downdown____ do you buy so much bread ____?why;forwhat;forwhy;towhat;to

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Teacher is often ___ the classroom.onofup and downdown____ do you buy so much bread ____?why;forwhat;forwhy;towhat;to

Teacher is often ___ the classroom.onofup and downdown____ do you buy so much bread ____?why;forwhat;forwhy;towhat;to
Teacher is often ___ the classroom.
on
of
up and down
down
____ do you buy so much bread ____?
why;for
what;for
why;to
what;to

Teacher is often ___ the classroom.onofup and downdown____ do you buy so much bread ____?why;forwhat;forwhy;towhat;to
up and down
what for

teacher is often up and down the classroom
老师经常在教室
what do you buy so much bread for
你买这么多面包干什么?

1.up and down
2.what for

选up and down
来来往往
老师常常来往于教室。
选what;for
相当于 why
你买这么多面包干什么?