I. Skimming and Scanning Go through the passage quickly and answer the following questions briefly. 1. Why did people paste New Year ’ s Wood Block Paintings on the walls and doors? 2. Who were the two brothers named Shen Tu and Yu Lei? 3. Why did the emperor in the Tang Dynasty ask Wu Daozi to draw Zhong Kui? 4. When was wood block printing invented? 5. What did the contents of the paintings depict?