問題詳情

57. Privacy advocates are troubled by the array of video cameras, motion detectors and other sensors ______ the shopping aisles.
(A) monitor
(B) monitoring
(C) monitored
(D) to monitor

參考答案

答案：B
難度：簡單0.715631
統計：A(46),B(380),C(46),D(32),E(0)

用户評論

【Novia Wang】評論

查了每個單字 還是看不懂

【Hsu Baleng】評論

分詞構句，刪除連接詞，將從屬子句動詞改成Ving或Ved