Question

—Do you know Tom came _____ third in the marathon held yesterday?
—Yeah！And it was _____ 18-hour bicycle marathon

1. A.
   不填; the
2. B.
   the; 不填
3. C.
   不填; an
4. D.
   the; a

Answer 1

C
考查冠词第一空不填，因为third这里是副词，come third获得第三名，第二空填an，指一次18小时的自行车马拉松，因为eighteen是元音开头的单词，用an。选C。