find the word whose stress pattern is different from the others of the same group
1. A.benefit B.medical C.educate D.discover
2. A.decorate B.develop C.politics D.exercise
3. A.important B.invention C.domestic D.relative
4. A.essential B.assistant C.violence D.musician
5.A.introduce B.understand C.disagree D.production
6. A.popular B.stimulate C.condition D.genera
7. A.establish B.electric C.successful D.organise
8. A.positive B.different C.community D.interest
9. A.behavior B.participate C.comprehend D.entertain
10.economic B.participate C.comprehend D.entertain