1.study=>studied
2.wash=>washed
3.climb=>climbed
4.finish=>finished

6.dance=>danced
7.close=>closed
8.dance=>danced
9.carry=>carried
10.decide=>decided
11.laugh=>laughed
12.c />13.explain=>explained
14.live=>lived
15.arrive=>arrived
 

 1.studied
 2.washed
 3.climbed
 4.finished
 6.danced
 7.closed
 9.carried
10.decided
11.laghed
12.continued
13.explained
14.lived
15.arrived