问题补充：
---When shall we meet your cousin at the station?
---His plane took off 2 hours ago, and it arrive at 5pm.
A. could
B. should
C. must
D. can
答案：
A. could
(答案→)B. should
C. must
D. can
解析：考查情态动词。A可能；B应该；C一定，必须；D可能；结合句意可知B正确。句意：—我们什么时候去车站接你堂哥？—他的飞机2小时前起飞的，按照道理应该5点钟到。
