Having heard wolves howling in the forest, Lala her walk up the path to the caves fearing that there might be wild beasts lying in wait for her.
Walking alone in the dark, the boy whistled to __________ his courage.
I don't think the experiment is __________ failure. At least we have gained __________ experience for future success.
The party last night was __________ big success and all the people present had __________ great fun.
The two sportsmen congratulated each other __________ winning the match by shaking hands.
The development of the city's industry __________ its environment pollution.