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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語老師正在告訴我們一些關于志愿工作者的事情．

解答 答案B．
本句話的主語是"A teacher of English and class teacher"，其表示的是一個人，這個人既是英語老師，也是班主任老師．故謂語動詞使用單數(shù)形式．可排除A和D．C項使用的是被動語態(tài)，而teacher和give之間是主動關系，所以C不正確．故答案選B．

點評 并列結構作主語謂語用復數(shù)：
如：Reading and writing are very important．
注意：當主語由and連結時，如果它表示一個單一的概念，即指同一人或同一物時，謂語動詞用單數(shù)，and此時連接的兩個詞前只有一個冠詞． 
如：The iron and steel industry is very important to our life．

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