【正文】
the earths and stones, millions16. Help yourself to __________.A. chickens and apples B. chickens and appleC. chicken and apple D. chicken and apples 17. Oh, dear. I forgot the two _________.A. room’s number B. rooms’ number C. room numbers D. rooms’ numbers18. She has been in Tianjin for ten years. Tianjin has bee her second _________.A. family B. house C. home D. room19. Excuse me, how can I get to the nearest ___ shop?A. shoes B. shoe C. shoes’ D. shoes20. You need more ___ to keep fit.A. practice B. train C. exercisesD. exercise