Do you agree the old saying “Seeing is believing?” In fact, we shouldn’t always 　(6)　 our eyes. Although we can know the world better through our eyes, what we see may sometimes not be true. Have you ever 　(7)　 of optical illusions? Look at Picture A first. Which line is the longest? Your answer may be ③, but the three lines are the same length. Then look at Picture B. Which man is the tallest? This is another easy question, 　(8)　 it? Is your answer ③ again? 　(9)　, the three men are the same size. In these two cases, our eyes trick us, 　 (10)　?