The impact of the Greenhouse Effect has long been ______ and special attention is called upon to examine this issue.
【正确答案】
B
【答案解析】解析：本题考查形近单词辨析。overcome，克服；overlook，忽略；overcharge，要价过高；overeat，吃得过多。从句子意思来看，主语是impact，所以用overlook，表示影响被忽略，才能跟后面的句子意思吻合，故答案选B。