(A) To have a review of the contemporary American history.
(B) To remind people that we should never forget the past.
(C) To explain why Americans liked the Smiley Face during that period.
(D) To show how the Spain brothers made a fortune through selling the yellow grin.
4. In the expression "Loufrani's actions irked Ball" (para.7), the word "irked" can best be replaced by ______.
(A) perplexed
(B) provoked
(C) irritated
(D) challenged
5. Which of the following is NOT true about the "World Smile Day"?
(A) It was established to commemorate the founder Harvey Ball.
(B) It was to promote general kindness and charity toward children in need.
(C) It was declared by Harvey Ball in 1999.
(D) It was decided to be held on the first Friday in October each year.
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