单选题
For over a million years, our forefathers were basically ______.
A、
successful farmers
B、
co-operating hunters
C、
runners and jumpers
D、
skillful sportsmen
【正确答案】
B
【答案解析】
[解析] “We must briefly look back at our forefathers，they spent over a million years evolving as cooperative hunters．”根据句意，选择答案B。
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