2. 外语
  3. The police were on the alert______any suspicious packages that might contain chemicals.

The police were on the alert______any suspicious packages that might contain chemicals.

admin2013-06-19  29
问题 The police were on the alert______any suspicious packages that might contain chemicals.
选项 A、for
B、to
C、at
D、with
答案A
解析 be on the alert for表示“警惕着，对……保持戒备(状态)”，如：Police warned thepublic to be on the alert for suspected terrorists．警方警告群众警惕涉嫌的恐怖分子。
转载请注明原文地址:https://jikaoti.com/ti/ej6MFFFM
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)