A. think about B. endless C. criterion D. in public A. sooner or later B. take pride in C. bring out D. sauerkraut A. introduction B. tick tock C. photography D. root A. flashback B. do morning exercises C. exactly D. less than A. silent B. rob C. achieve D. improvise A. briefly B. bravery C. fail D. global warming A. add B. Beijing Opera C. score D. engineer A. slide B. fall down C. take down D. pride A. personnel B. deal C. postage D. typesetting A. food chain B. kilometer C. ozone layer D. influence