A. prevent from B. recount C. spare time D. lecturer A. expert B. language C. cheer up D. nowadays A. in time B. Sweet tooth C. federal D. event A. graduation B. by C. break out D. set in A. holiday B. noisily C. alright D. system A. atom B. oil rig C. eighteen D. carnivore A. cabin B. drink C. fix up D. throat A. reptile B. annoyance C. subject D. racing A. blender B. astronomer C. different D. winkle A. retrace B. action C. thermodynamics D. shellfish