【正文】
rect answers: 1. The first thing that was found at Zhoukoudian is______ . A. prehistoric human skulls B. prehistoric human bones C. prehistoric human teeth 2. The number of items that were eventually found is____ . A. 100 B. 150 C. 200 3. The number of places where Beijing Man lived is______ . A. 4 B. 6 C. 8 4. The percentage of people who lived to the age of 50 is______ . A. more than 70% B. about 30% C. less than 5% 5. The reason why work on the site stopped is that______ . A. German invaded China B. Japan invaded China C. France invaded China 6. The site became a world heritage site in______ . A. Septem