Some people either _____ avoid questions of right and wrong or remain neutral about them.
A.violently
B.sincerely
C.properly
D.deliberately
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D解析deliberately(=on purpose)故意地。Sincerely真诚地；violently强暴的，激烈的，暴力引起的。properly 1)好好地，恰当地；She never makes any attempt to clean it properly.(她从来也不打算好好地把它擦干净。) 2)严格地：Properly speaking, a whale is not a fish.(严格地说，鲸鱼不是鱼。)