下列词语中加点的字读音都不相同的一组是（   ）

A．唾弃沉睡千锤百炼捶胸顿足

B．憔悴粉碎猝不及防出类拔萃

C．啜泣拾掇缀玉连珠苦学不辍

D．悼念泥淖绰绰有余掉以轻心

It’s _______ thrill to have ______ ten-year research project completed with the desired result.

A．/ ; the

B．a; the

C．the; a

D．a; a