Question

Who had written the letter to whom and
Where ?
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Answer 1

For example Zac wants to send a letter to his friend Bill, Zac will to write the letter then he will to put it in envelope then Zac hs to write Bill's address so it will go to Bill's location then Zac will put the envelope in a mailbox so the mailman will see the address then sends to Bill's location and eventually, Bill will receive his letter from Zac.