Hearing his travelling ________, I knew that he was an ________ traveller．
A.experiences; experiencedB.experience; experienceC.experiences; experiencingD.experience; experiencing在线课程A
experience作“经历”讲时是可数名词；作“经验”讲时是不可数名词。experienced意为“有经验的，熟练的；有阅历的”。本题意为“听了他的旅行经历之后，我知道了他是一位有经验的旅行者”。