单选题 I'll make______Mark was once a good singer.
A. it known as all that B. it known to all that
C. that known to all that D. that known to all

【正确答案】 B

【答案解析】[解析] 考查it的用法。it在句中作形式宾语，真正宾语为：that he was once a good singer。it应放在make之后。make it known to sb．意思为“让某人知道”。