spread/drop/ mean/ put out/stared/ courage/set out

（1）It will bring danger to all ocean life if sharks' numbers 　 　 too low.

（2）We shouldn't forget where we came from as we 　 　 on our new journey.

（3）Tom went to basketball practice with 　 　 rather than fear in his heart the next day.

（4）They 　 　 in disbelief at the black smoke rising above the burning building.

（5）John is 　   　 and only thinks about himself and doesn't treat others nicely.