单选题 Please tell me all ______ Mr. Wang had told you the day before.
A. which B. that C. whose D. when

【正确答案】 B
【答案解析】[解析] 本题测试点是定语从句的用法。all是先行词，根据语法规则，当先行词是all, some thing, everything等时，必须由that引导定语从句。选B符合题意。