I can’t give my son the leading position. , he is too young; secondly, I want Mr. Smith to have the job.
A. After all
B. First of all
C. Above all
D. In all
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(答案→)A. After all
B. First of all
C. Above all
D. In all
解析：本题考查all短语辨析。after all毕竟，终究；for example例如；in the end最后；to begin with 首先。根据句意知应选D项。