The general asks the soldiers many questions to keep them on their toes. The underlined part means _______.

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问题 The general asks the soldiers many questions to keep them on their toes. The underlined part means _______.

选项 A、curious
B、busy
C、focused
D、alert

答案D

解析 将军问了战士们许多问题,目的是要让他们保持警惕。下划线部分的含义是______。A.curious“好奇的” B.busy“忙碌的”C.focused“专注的”D.alert“警惕的”注:短语on one’s toes的意思是“保持警惕”,这里与D含义相同。
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