单项选择题

When and where the new hospital will be built _______ a mystery.

A．to remain
B．remains
C．remain
D．is remaining
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单项选择题
If Dorothy had not been badly hurt in a car accident, ______ in last month' s Olympic Games.
A．she would participate (参加)
B．she might participate
C．she would have participated
D．she must have participated
单项选择题
He never wrote to his father______ he was in need of money.
A．except
B．except when
C．except for
D．except that
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