题目：
We _____ into five groups to go to the old people's homes. We did many things to cheer them up. [ ]
A. divided
B. are divided
C. were divided
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C解析：伤寒时出现稽留热，查体见胸腹部数个鲜红色皮疹为玫瑰疹。
