一My flight was delayed because of heavy rain—But you are just in time for the discussion．

问题补充：

一My flight was delayed because of heavy rain．

—But you are just in time for the discussion．

A. the；a

B. a；the

C. 不填；不填

D. the；不填

答案：

A. the；a

B. a；the

C. 不填；不填

(答案→)D. the；不填

解析：考察冠词的用法。引起我的航班延误应该是特指的一场大雨，所以第一空要用定冠词来限定，in time及时，准时，固定短语。