1.b> ( i>);
2.b> (to) , , ; it provided the spur to further research / ; my poor exam results acted as a spur to make me study harder / ;
3.b> .i> / , ;
on the spur of the momentb> , , i> ; I phoned him up on the spur of the moment ; to win / to earn / one's spursb> ) .i> / ; ) .i> ; .