There was such a long queue for coffee at the interval that we gave up.
A. eventually
B. unfortunately
C. generously
D. purposefully
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(答案→)A. eventually
B. unfortunately
C. generously
D. purposefully
解析：副词辨析。A最后，终于；B不幸地是；C慷慨的；D故意地；结合句意可知A正确。句意：有很长的队伍等着买咖啡以至于我们最后放弃了。