It’s certainly hard work.But, a man who wishes to have a career has to make a great many sacrifices.A.on the contraryB.in additionC.on the other handD.in that case
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C解析这题考查词组辨析：on the contrary正相反，in addition此外，on the other hand另一方面，in that case在那种情况下，句意是：这是很辛苦的，但另一方面一个想要有事业的人不得不做出很多的牺牲。选C。