题目内容
（请给出正确答案）
[主观题]
What does "we have been 'twiddling the knobs' for decades" mean？A．We have been changing th
What does "we have been 'twiddling the knobs' for decades" mean？
A．We have been changing the climate with thoughtless actions for decades.
B．We have been handling machines with poor skills for decades.
C．We have been following a misleading chapter about the earth for decades.
D．We have been mistaken in the belief in developing the agricultural infrastructure.
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