Smoking ____our health
Smoking ____our health Correct Answer affects
We use the Present Simple or Indefinite to talk about general facts that are always true and permanent about the world.So the sentence should be Present Simple. Here, smoking is a Gerund and used as an Uncountable Noun. Unountable Nouns are always singular in form. As per the rules of formation a Present Simple sentence, we use the base form of the verb and add -s or -es for the third person singular.So the answer is Affects.