【题目】The references I have made to light and existence only touch the surface of a very ________ debate.
A.complicatedB.confused
C.contentD.confident
在线课程【答案】A
【解析】
考查形容词词义辨析。句意：我所提到的光和光的存在只触及了一个非常复杂的争论的表面。A. complicated复杂的；B. confused困惑的；C. content满足的；D. confident自信的。由“touch the surface ”可知，complicated “复杂的”符合句意。故选A项。