【题目】The company had about 20 notebook computers but only one-third used regularly. Now we have 60 working all day long.
A. is
B. are
C. was
D. were
在线课程【答案】D
【解析】当分数、百分数作主语时, 要根据其后面的名词来决定其谓语动词的单复数。此处one-third应是one-third of the notebook computers的省略形式, 因此谓语动词用复数, 且句子的时态用了过去时, 所以D项正确。