After the teacher called him into the office, the boy admitted in the test.A. to cheatB.

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A. to cheat
B. cheated
C. cheat
(答案→)D. cheating
解析：动词admit承认，录取；构成固定搭配admit doing sth=admit having done sth承认做了某事；动词admit还可以构成be admitted to…被…录取。句义：在老师叫他进入办公室以后，这个男孩承认在考试中作弊了。根据句义说明D项正确。