trọng âm.
câu 1.a.muscle.b.organ.c.disease.d.poultry.
câu2.a.popular.b.essential.c.plentiful.d.national.
câu3.a.pocket.b.engaged.c.open.d.fortune.
câu4.a.technical.b.permanent.c.generous.d.addicted.
câu5.a.implant.b.waver.c.worship.d.double.
câu6.a.summary.b.interact.c.portable.d.specify.