--I will take an important test tomorrow.Oh really? !A. Good luckB. CongratulationsC.

问题补充：

--I will take an important test tomorrow.

--Oh, really? !

A. Good luck

B. Congratulations

C. Well done

D. What a pity

答案：

(答案→)A. Good luck

B. Congratulations

C. Well done

D. What a pity

解析：对于别人参加比赛或考试，我们通常表示祝愿说good luck，意思为祝你好运，故本题选A。