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About one-fifth of workers in that factory _____ in the earthquake.

A. was killed
B. were killed
C. had been killed
D. have been killed
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科目：高中英語 來源：月考題 題型：單選題

About one-fifth of workers in that factory _____ in the earthquake.
[     ]
A. was killed
B. were killed
C. had been killed
D. have been killed

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科目：高中英語 來源： 題型：

 About one-fifth of workers in that factory _______ in the earthquake .

   A. was killed    B. were killed       C. had been killed  D. have been killed  

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