下列词语中加粗的字，每组的读音完全相同的一项是[ ]

A．落笔／落照／剥削／瘦削不堪／靡靡之音／风靡一时

B．刹那／古刹／累赘／果实累累／强弩之末／强人所难

C．佣工／佣金／攒射／万头攒动／解甲归田／解囊相助

D．殷红／殷切／绰约／绰绰有余／擢发难数／数典忘祖

I am quite busy _____ weekends I have to go to English class _____ Sunday mornings and dancing class

after lunch.    [ ]

A. at; in

B. in; in

C. in; on

D. on; on