You don’t have to know the name of the author to find a book. You find the book by the title.
A. must
B. need
C. can
D. would
网友回答
A. must
B. need
(答案→)C. can
D. would
解析：考查情态动词题干含义是：你不一定要通过知道作者的名字去查找一本书，你可以通过标题去查找。根据提干含义，可以确定选用可以表能力的情态动词can。must表一定，need表需要，would表示会。