单选题
To find out how the bees managed to tell time, an unusual experiment was _______ four years ago.
A、
carried on
B、
carried away
C、
carried out
D、
carried out
【正确答案】
C
【答案解析】
a. carried on 继续 b. carried away 得意忘形 c. carried out 执行 d. carried over继续下去；使继续下去(2) 把…争取到自己这边来
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