It never ____________to me that he would be charged with murder.

A．happened

B．took place

C．occurred

D．Came

运动中，肌肉会产生酸痛感，这是肌肉产生（）导致肌肉疲劳。

A.ATP、CP

B.丙酮酸

C.乳酸

D.氨基酸