D Having too much confidence is not good. And now, a new study has proved this by finding that overconfident teenage students can stunt crucial（决定性的）reading skills. The study shows a clear connection between overconfident students and low reading comprehension. “While some self-confidence is helpful, overconfident 15-year-olds are often below-average (平均水平) readers in all 34 countries we studied, ” says Ming Ming Chiu, the lead author of the study. “In contrast, under-confident 15-year-olds are more likely to be above-average readers in all 34 countries, ”the expert added. The difference lies in a student’s ability to exactly assess (估计) and evaluate his or her own reading level, according to Chiu. Those who can accurately assess their strengths and weaknesses are usually in a better position to identify realistic goals and achieve them. “If an overconfident student chooses a book that is too hard—such as The Lord of the Rings rather than Harry Potter and the Sorcerer’s Stone—he or she might stop reading after a few pages and let it sit on a bookshelf,”says Chiu. “In contrast, a more self-aware student is more likely to finish an easier book and continue reading more books, ”the expert added. 67．The underlined word “stunt” in Paragraph 1 can be replaced by          . A. improve                   B. help                         C. prevent                    D. find 68．Which of the following is true? A. Under-confident 15-year-olds are less likely to be above-average readers. B. Overconfident 15-year-olds are often below-average readers. C. Under-confident 15-year-olds are more likely to be below average readers. D. Overconfident 15-year-olds are often above-average readers. 69．People who can exactly assess their strengths and weaknesses can          . A. choose a better book                                     B. gain more money C. have realistic goals and achieve them              D. have a great improvement in their marks 70．A more self-aware student is more likely to          . A. stop reading after a few pages                       B. put the book on a bookshelf C. finish an easier book                                     D. write books