As prices for imported staples such as barley soar and key markets like South Africa ( ), companies are finding market opportunity with home grown brews in other parts of the continent.

　　A.spike

　　B.obstruct

　　C.surge

　　D.stagnate

　　【答案】D。考查动词辨析。A 项：阻止;B 项：妨碍、阻塞;C 项：汹涌、蜂拥而来; D 项：停滞、使萧条。根据句意：由于大麦等进口原料的价格飞涨，而南非等主要市场又出现消费停滞，因此，这些公司正在非洲大陆其他地区为家酿啤酒寻找新的市场机会。D 项符合语境，故正确答案是选项 D。