A.exploration
B.efforts
C.sacrifice
D.methods
A.in short
B.in sum
C.in part
D.in the end
A.apply
B.give
C.devote
D.contribute
A.climb
B.land
C.reach
D.jump
A.match
B.competition
C.myth
D.game
A.advance
B.fly
C.operate
D.control