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    19．A teacher of English and class teacher _______ us something about volunteer workers．（　　）
    A．are tellingB．is tellingC．are givenD．were given

    分析 一位兼任班主任的英语老师正在告诉我们一些关于志愿工作者的事情．

    解答 答案B．
    本句话的主语是"A teacher of English and class teacher"，其表示的是一个人，这个人既是英语老师，也是班主任老师．故谓语动词使用单数形式．可排除A和D．C项使用的是被动语态，而teacher和give之间是主动关系，所以C不正确．故答案选B．

    点评 并列结构作主语谓语用复数：
    如：Reading and writing are very important．
    注意：当主语由and连结时，如果它表示一个单一的概念，即指同一人或同一物时，谓语动词用单数，and此时连接的两个词前只有一个冠词． 
    如：The iron and steel industry is very important to our life．

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