单项选择题

______ , this kind of disease can do great harm to people there.

A．Occurring where
B．It occurs where it is
C．Where does it occur
D．Wherever it occurs
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We hadn't met for 20 years, but I recognized her ______ I saw her.
A．for the moment
B．the moment
C．the moment when
D．at the moment that
单项选择题
______ you are leaving tomorrow, we can eat dinner together tonight.
A．For
B．Since
C．When
D．While
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