单项选择题

Having a trip abroad is certainly good for the old couple, but it remains ____ whether they will enjoy it.

A．to see
B．to be seen
C．seeing
D．seen
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单项选择题
Be careful when you cross this very busy street. If not, you may get ____ by a car.
A．run out
B．run over
C．run away
D．run after
单项选择题
___, some famous scientists have the qualities of being both careful and careless.
A．Strangely enough
B．Enough strangely
C．Strange enough
D． Enough strange
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