A. its B. sweep the snow C. frequently D. contamination A. try B. punctuate C. astronomy D. body A. snake B. set in C. don't mention it D. upwards A. occurrence B. no wonder C. bath D. together A. believe B. accustomed to C. ill D. blender A. bamboo B. NASA C. before long D. sickness A. modest B. birthday C. come out of D. cast down A. why B. uncrowded C. get D. hare A. lucky B. mathematics C. politics D. poverty A. diminish B. the Arctic C. DVD D. Europe