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题目内容
（河北民族师范学院 -大学英语）
Workers who had lost their jobs left the factory _____ very bitterly about the way they had been treated.
得分：5分
A.complain
B.to complain
C.complaining
D.complained
得分：5分
A.complain
B.to complain
C.complaining
D.complained
参考答案