第30题: [单项选择]Sales representatives always need to be ______ of the effectiveness and swiftness of their services to their customers, who will share their experiences. A. conscious B. capable C. committed D. anxious 参考答案:A 答案解析:要记住“be+形容词+介词”这个固定用法。能和后面的of搭配的是A选项和B选项,接下来就是词义的分析。销售部的职员必须“注重”效率,所以be conscious of是正确答案。be capable