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(单选题)Why did two boys come to the restaurant? (单选题)Which of the following caused some people to leave their tab (单选题)According to Dr. Singer, ______. (单选题)From the article, we can know that ______. (单选题)The author used the example of “dice” to show that ______. (单选题)In how many ways do toys change according to the first parag (单选题)What does the underlined part “in dread of” in the last para (单选题)By going to the concert, the writer has most probably learnt (单选题)Mrs. Ghent decided to take the writer to that concert mainly (单选题)When the concert was over, the writer cried because ______.