Dela had made up his mind to give it up but on second thought he determined to try thi

问题补充：

Dela had made up his mind to give it up ,but on second 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：本题第一空考察的是固定搭配on second thoughts经再三考虑之后；第二空考察的是序数词的特殊用法，在序数词前面加上不定冠词a/an表示再一，又一；句义：Delaware下定决心要放弃，但是仔细考虑以后，他决定再试一次。故A正确。