He would have finished his college education, but he __________ to quit and find a job to support has family.
A. had had
B. has
C. had
D. would have
Synonyms (同义词)of “important”
A. crucial
B. vital
C. significant
D. essential
目前中国国内图书馆常用的分类法是()
A. 关键词法
B. 网络分类法
C. 实用分类法
D. 中国图书馆分类法
某本图书的书标是C81/F61,大类(一级)是()
A. C
B. C8
C81
D. F61