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

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：情景交际。Good luck祝你好运；Congratulations恭喜你； Well done做的不错； What a pity太可惜了。句意：我明天要参加一次重要考试。——哦，真的吗？可知选A最符合语境。