题目内容
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 |
【答案】
D
【解析】考查单复数和时态,one-third of 20 notebook computers,可知主语是复数,有后面的Now可知,前面是过去时态,所以选D
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