It was with great delight that I read in your February the letter to the Editor written by Prof. Johnson.
A. issue
B. item
C. magazine
D. copy
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(答案→)A. issue
B. item
C. magazine
D. copy
解析：词义辨析。 A. 问题；期号 B.条款；项目 C.杂志 D. 副本。句意：非常高兴地拜读了贵刊二月的一期中所登载的约翰逊教授致编辑的信. 此处是指某杂志二月份的那一期，故应选issue。故选A。