【题目】People around the world are becoming more and more _____ about the population explosion.
A. concernedB. interested
C. involvedD. disappointing
在线课程【答案】A
【解析】
考查形容词辨析。句意为：世人对人口膨胀越来越担心。concerned意为“担心的，挂念的”；interested意为“ 感兴趣的”；involved意为“有关的；卷入的”；disappointed意为“令人失望的”。故选A。