E/ What do the following words or expressions mean? Choose the right alternative :
Crucial (paragraph two):
essential
useful
successful
Boosting (paragraph four):
increasing
helping
rewarding
Backfire (paragraph four) :
explode
succeed
fail
Perk (paragraph five) :
improvement
bonus
satisfaction
May not be in the cards (paragraph five):
inefficient
unavailable
within reach
Top (paragraph five):
reward
satisfy
assist
