国家开放大学 / 综合英语（1）
正确率：100%
The writer got to the railway station _ _ _ _ _ _ _ the train left.
a.about an hour before
b.a few hours before
c.an hour after
d.just enough time before
a.about an hour before
b.a few hours before
c.an hour after
d.just enough time before
参考答案：