单选题 If people weren't prepared to experiment with new teaching method, thing would never change.
A．campaign B．swerve C．endeavor D．manipulate

【正确答案】 C

【答案解析】[解析] 动词辨析
experiment with表：进行试验，做试验；A．campaign参加活动，作战；B．swerve突然转向；C．endeavor尽力，努力，尝试；D．manipulate(熟练地)操作，巧妙地处理；因此 C为答案。