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

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

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

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【C17】A．enormouslyB．efficientlyC．effectivelyD．elaborately

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

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【C3】A．proficientB．efficientC．sufficientD．elaborate

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

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53._________A. explainB. understandC. fightD. ana

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