单项选择题 It is the usual（）in our school that if you spoil any material，you’ll have to pay for it．

单项选择题 Only when I read The Da Vinci Code a second time（）to appreciate its good planning．

填空题 根据括号内所给单词的正确形式填空。Thin as it is ，this（）（book）cost me eight dollars.