Focus on the pronunciation of tell
English definition of “tell”
/tel/ v [I/T] (past tense and past participle told /toʊld/) (KNOW)
› to know or recognize: [I] It’s hard to tell which is better. [T] It’s easy to tell a robin by its red breast. [+ (that) clause] I could tell that you were unhappy. [T] This one is supposed to be better, but how can you tell the difference?