单项选择题

On a rainy day I was driving north through Vermont ______ I noticed a young man holding up a sign reading "Boston".

A．which
B．where
C．when
D．that
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单项选择题
I didn't send out my application form last week, but I
A．had to
B．would do
C．should have
D．might have to
单项选择题
Whoever formulated the theory of the 'origin of the universe, it is just ______ and needs proving.
A．spontaneous
B．hypothetical
C．intuitive
D．empirical
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