enter efficient judge danger negative access grateful experience surround rarely 1. Children in China school at the age of 6 or 7 and must study there for at least nine years. 2. The earth is by air, which makes up its atmosphere( 大气层 ). 3. This machine sells much better than the others because it’s not only _____ but also safe. 4. Only a few people have ______ to the top secrets of the company. 5. I am ______ to my parents for all that they have done for me. 6.I can’t ______ whether he was right or wrong, so I have to ask someone else. 7. There is a(n) ________ that the bridge may fail under the heavy traffic. 8. He has a(n) _________ way of looking at life and often feels sad. 9. The team ______ many ups and downs on its way to success.. 10. Nick often drinks coffee but _______ drinks tea.