A. won't B. affect C. friction D. past A. framework B. possible C. power D. look out A. Chinese tiger B. behind C. material D. threat A. brochure B. pound C. somebody D. succeed A. stage B. technique C. breed D. thirty A. announce B. designer C. boot D. for instance A. harm B. thorough C. optimistic D. address A. keep a secret B. upper C. carbon dioxide D. drink to A. lost and found box B. postcard C. go to work D. spectacular A. try one's best B. by bus C. used to D. sincerely