I atesandwich while I was waiting for20:08 train.A. the aB. the theC. a theD. a a

问题补充：

I atesandwich while I was waiting for20:08 train.

A. the, a

B. the, the

C. a, the

D. a, a

答案：

A. the, a

B. the, the

(答案→)C. a, the

D. a, a

解析：在等20:08的火车期间吃了一个三明治，是泛指，八点零八分的火车当然是特指的了。故选C。