the company had zbout 20 notbook computers but only one_third ____used regularly.now we have 60 working all day long

the company had zbout 20 notbook computers but only one_third ____used regularly.now we have 60 working all day long
A is
B are
C was
D were
英语人气:457 ℃时间:2019-12-11 19:52:33
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D
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