问题补充：
------Can you tell me traveling to Dalian?
------About two hours by plane.
A. how much it costs
B. how soon it takes
C. how long I will take
D. how many hours I will spend
答案：
A. how much it costs
B. how soon it takes
C. how long I will take
(答案→)D. how many hours I will spend
解析：句意：--你能告诉我我要花几个小时到大连吗？--坐飞机大约两个小时。cost、take、spend都有花费时间或金钱做某事的意思，但用法有区别：cost 物作主语；take通常由形式主语it做主语；spend 人做主语，spend---(in) doing sth。空格后为traveling，故选D。
