I'm certain David's told you his business troubles. , it's no secret that he owes a lot of money to the bank.
A. However
B. Anyway
C. Therefore
D. Though
网友回答
A. However
(答案→)B. Anyway
C. Therefore
D. Though
解析：在语境中考查副词的用法。根据前面：I’m certain…看出为什么他那么肯定呢？是因为“无论如何他欠债都不是秘密了”。答案C把前因后果弄反了。