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(yǔ)老師正在告訴我們一些關(guān)于志愿工作者的事情．

解答 答案B．
本句話的主語(yǔ)是"A teacher of English and class teacher"，其表示的是一個(gè)人，這個(gè)人既是英語(yǔ)老師，也是班主任老師．故謂語(yǔ)動(dòng)詞使用單數(shù)形式．可排除A和D．C項(xiàng)使用的是被動(dòng)語(yǔ)態(tài)，而teacher和give之間是主動(dòng)關(guān)系，所以C不正確．故答案選B．

點(diǎn)評(píng) 并列結(jié)構(gòu)作主語(yǔ)謂語(yǔ)用復(fù)數(shù)：
如：Reading and writing are very important．
注意：當(dāng)主語(yǔ)由and連結(jié)時(shí)，如果它表示一個(gè)單一的概念，即指同一人或同一物時(shí)，謂語(yǔ)動(dòng)詞用單數(shù)，and此時(shí)連接的兩個(gè)詞前只有一個(gè)冠詞． 
如：The iron and steel industry is very important to our life．

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