交通银行

单选题 The advertisement for the security guard position says that applicants must be able to remain__________for six hours straight.

A.alert
B.observable
C.discovered
D.obvious

参考答案:A进入在线模考
选择恰当的词汇填入动词remain之后的补语的位置。remain后面主要接表示状态的形容词,作为招募警卫员的广告,填入空格为“警戒的”形容词最为恰当。