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 |
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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 |
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