题目内容
| During the period of recent terrorist activities,people ______ not to touch any unattended bag. A.had always been warned B.were always being warned C.are always warning D.always warned |
| B |
| 考查时态和语态的用法。根据时间状语可知是指过去,be always doing sth.能表示一种感情色彩,并且people与warn之间是被动的关系,所以答案为B项。 |
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