语法与词汇 22.Many experts on international affairs expressed concern that Trump's unilateral approach to globalization and multilateral efforts in international relations would put US-China relations on a rocky and ______ path. However, most of them breathed a collective sigh of relief after Trump's visit to Beijing.
【正确答案】 A
【答案解析】本题考查形容词辨析。根据a rocky and______path可知，所填词与rocky修饰名词path，rocky意为“坎坷的、艰难的”，precarious(不确定的，不安全的)符合语义，故答案为[A]项。persistent意为“持续存在的，继续发生的”；perspicacious意为“敏锐的，有洞察力的”；pertinacious意为“坚定不移的，义无反顾的”。