The police were on the alert______any suspicious packages that might contain che

游客2024-10-11 34

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:http://tihaiku.com/zcyy/3796496.html

相关试题推荐

随机试题

最新回复(0)

Unfortunatelythereportwasprepared______andcontainedseveralinaccuracies.W