单项选择题

______ 1895 did Cornell University begin to offer a degree in ornithology (鸟类学).

A．Not until
B．Not since
C．Until
D．In
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单项选择题
(On the whole), ambitious students (are much likely) to succeed in their studies than (those) (with) little ambition.
A．On the whole
B．are much likely
C．those
D．with
单项选择题
Some bosses dislike (to allow) people (to share) their responsibilities; they keep (all) important matters (tightly) in their own hands.
A．to allow
B．to share
C．all
D．tightly
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