--It really shocked us that he should have made such rapid progress in his study in such a short time!
--No surprising. He has been making most of his spare time to study.
A. a; the
B. a; /
C. /; the
D. /; /
网友回答
A. a; the
B. a; /
(答案→)C. /; the
D. /; /
解析：考查冠词：第一空不填，因为progress是不可数名词，第二空填the，make the most of…充分利用，句意：他在这么短的时间竟然取得这么大的进步真是让人惊讶。--一点不奇怪，他一直利用他的业余时间学习。选C。