A. hill B. library card C. either or D. before A. carbonated B. difficult C. in time D. a glass of A. try B. eventually C. amateur D. on the increase A. them B. age C. congestion D. merciful A. flower B. at the top of C. inflatable D. injured A. disunited B. imperceptible C. soothe D. park A. go on a trip B. Chinese tiger C. Egypt D. good idea A. compare with B. spare time C. underestimate D. lake A. again B. backstage C. told D. vaccination A. care about B. Japanese C. complicated D. easy