Have you ever heard ___them?No,never.A.of B.from哪个对?

题目

Have you ever heard ___them?No,never.A.of B.from哪个对?

答案

hear of 听说
hear from 收到来信
A更好.你曾听说过他们吗?
B,收到信来自一个人还好理解,来自他们的信,不太好理解