单项选择题

Hospital doctors don" t go out very often as their work takes ______ their time.

A．away
B．over
C．in
D．up
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单项选择题
His oral English was so poor that he fond it impossible to make himself ______.
A．understand
B．understood
C．to understand
D．understanding
单项选择题
Not until yesterday ______ anything about the project that will be completed soon.
A．did I learn
B．have I learnt
C．I learnt
D．that I learnt
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