问题补充：
I can hardly imagine a hard-working man like Jacky Chan. Could you tell us ?
A. how much time did he devote to charity
B. what is Jacky Chan like
C. if or not his new movie Police Story is shown
D. what makes him so energetic
答案：
A. how much time did he devote to charity
B. what is Jacky Chan like
C. if or not his new movie Police Story is shown
(答案→)D. what makes him so energetic
解析：句意：我几乎想象不到像成龙这样勤奋的一个人。你能告诉我是什么使他如此用精力吗？A他用于慈善事业的时间是多少B成龙这个人怎么样C他的新电影警察故事是否上映.D什么使得他如此有活力；故选D，
