People should by a train ticket-----if they want to take a seat on it before the arrival of theSpring Festival.A:by chance B:at ease C:in jeneral D:in advance
网友回答
肯定是D in advance 提前 就是人们春运前要提前买票才有座位坐
A 偶然；意外地
B安逸,自由自在；舒适
C总之,通常；一般而言（应该是in general 吧）
======以下答案可供参考======
供参考答案1:
Din advance 提前