As I said, I’m going to continue explaining some more examples about irregular verbs. So the first example in this blog is “I think every cartoonist in America has (drew / drawn) at least one caricature of a president”. the correct answer is drawn because has always needs a participle after. I couldn't believe it when my mother said that gasoline (cost / costed) fifty cents a gallon when she got her license. the correct answer is cost because there is no word called costed. So, here we finished all blogs. no blogs any more and no grammar quizzes any more.  

thank you