1 状语是:because they are sturdy and lightweight.
连词是because.
2 状语是:Before he was cast in his first film.
连词是:Before
3 状语是:in case there is a natural disater.
连词是:in case
4 状语是:as his father and grandfather had done before him
连词是:as
5 状语是:so that the right brush is always on hand.
连词是:so that
6 状语是:in spide of the fact that all seats were taken.
连词是:in spite of
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