That is false. You can use a P.S. (post script) at the end of a business or formal letter, but it is uncommon.
Answer:
I think first one because it does not talk only about americas highways
Because they have work and need to pay
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Out of the following choices given, the sentence that contains an infinitive is "Heather wants to go to the store with us." The infinitive is "to go." The correct answer is A.