问题
选择题
It be difficult to get a train ticket during traditional Chinese Spring Festival this year because there are many ticket windows.
A．mustn't
B．ought to
C．needn't
D．can't
答案
答案：D
考察情态动词用法。A千万不能，禁止；B应该；C不需要；D不可能。结合句意可知D正确。句意：在传统的中国春节期间买到火车票是不可能那么困难的，因为有很多的售票窗口。