Johnson had made up his mind to give it up but onsecond thought he determined to try third

问题补充：

Johnson had made up his mind to give it up，but onsecond thought he determined to try third time.

A. /；a

B. /；/

C. a；a

D. the；a

答案：

(答案→)A. /；a

B. /；/

C. a；a

D. the；a

解析：本题考查冠词习惯用语和冠词的基本用法。on second thought意为“进一步考虑后；经再三考虑”；try a third time “a+序数词”表示“又一；再一”。