A．editionB．reasonC．comprehensionD．cause

A．thoughtB．createdC．supposedD．caused

A fireman discovered the______of the fire.A．truthB．reasonC．causeD．fact

The police could not find a motive for the murder.A.targetB.reasonC.discussionD.remark

【C20】A．resultB．reasonC．purposeD．cause

【C7】A．resultB．reasonC．causeD．phenomenon

【C3】A．a questionB．a reasonC．an opinionD．an idea