Question

At the post office, he place stamp on the letter ( make Complex)

Answer 1

In the letter, a stamp was placed by him, at the post office.

Explanation:

• The sentence that has an independent clause and one or more dependent clauses is known as a complex sentence.

• The independent clause does not need any other clause to express its meaning or to convey its message.

• While the dependent clause needs other clauses to express its meaning.  

Answer 2

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In the letter, a stamp was placed by him, at the post office.