The company had about 20 notebook computers but only one-third _______ used regularly. Now we have 60 working all day long.（2006浙江）
A. is B. are C. was D. were
The company had about 20 notebook computers but only one-third _______ used regularly. Now we have 60 working all day long.（2006浙江）
A. is B. are C. was D. were
D
D考查主谓一致。主语为one-third，但省略了notebook computers，分数的主谓一致依据修饰的名词的数，故答案为D。