【題目】When the lawyer asks you questions about the case, you should be________.

A．on duty

B．on guard

C．on purpose

D．on watch

【答案】B

【解析】句意：當(dāng)律師問你關(guān)于案件的問題時(shí)，你應(yīng)該警覺一點(diǎn)兒。on guard“警惕；揣摩”。

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