【C10】A．advancingB．liftingC．raisingD．enhancing

【C20】A．enforceB．enlightenC．enhanceD．entitle

【22】A．strengthenB．accommodateC．stimulateD．enhance

One suggestion was to______ gasoline taxes.A．raiseB．have raisedC．be raisingD．raising

【C19】A．advancingB．developedC．matureD．settled

【C5】A．burstingB．explosionC．raisingD．extension

【C11】A．burstingB．explosionC．raisingD．extension