单项选择题

In reorganizing the curriculum in the late 1800's, Elizabeth Mead laid the foundation () the modern college rests.

A.is which
B.on which
C.which is on
D.on it

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In this modem era, we don't need to go to the library to search for information () we must decades ago.

A.like
B.for
C.since
D.as
单项选择题
You must have missed the meeting the other day, () you

A.mustn't
B.haven't
C.needn't
D.didn't
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