【C15】A．explainB．illustrateC．analyzeD．compare

【C5】A．explainB．coverC．describeD．elaborate

【C15】A．associatedB．connectedC．coincidedD．compared

Can you account for your absence from the class last Thursday？A．explainB．examineC．excuseD．

Recent pressure at work may account for his behavior.A.explainB.changE．C.influencE．D.embo

【C8】A．manifestB．illustrateC．revealD．indicate

【C14】A．explainB．describeC．defineD．state