单项选择题

______ Dr. Rossi hired the new assistant, the office has become more organized.

A． When
B． Before
C． While
D． Since
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The CEOs will meet______ Chicago next month.
A． at
B． in
C． to
D． from
单项选择题
Mary is ______ an excellent writer.
A． considerate
B． considered
C． considerable
D． considers
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