单项选择题

______ some flowers contain more nectar than others, how does a honeybee worker, faced with a patch of flowers containing variable amounts of nectar, decide when to stop collecting

A．Given that
B．Though
C．If
D．while
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单项选择题
Western Nebraska generally receives less snow than ______ eastern Nebraska.
A．does
B．in
C．it does in
D．in it does
单项选择题
Though her parents ______ her musical ability, Jerrilou's piano playing is really terrible.
A．pour scorn on
B．heap praise upon
C．give vent to
D．cast fight upon
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