A. top B. pay for C. exhilaration D. hobby A. bike B. snake C. primary school D. support A. bond B. invest C. Tibetan D. concert A. heart B. full-time C. in public D. stone A. solar system B. soon C. anymore D. climb a hill A. places of interest B. call back C. high school D. ticket A. fluctuation B. anybody C. gymnast D. giant A. slide B. spare C. scary D. solar A. huge B. jewel C. May Day D. had better A. earth B. disinherit C. waterfall D. trainer