Shéi zhīdào？
谁知道?
Who knows?
Notes:
谁(shéi): who
知道(zhīdào): to know
Example:
A:明天有聚会吗？
Mínɡtiān yǒu jùhuì mɑ？
Is there a party tomorrow?
B:谁知道？
Level: ★★★☆☆
