A. mainstream B. preservation C. nuisance D. eighty A. spawn B. centimeter C. sixty D. bye A. little by little B. concentrate C. fifteen D. academy A. regulation B. nineteen C. be in trouble D. blueprint A. all right B. building block C. spare time D. finely A. twelve B. shoulder C. seventy D. discover A. warmly B. thirteen C. leakage D. met A. illumination B. albatross C. trivial D. crayon A. develop B. sob C. schoolyard D. fifty A. in amazement B. bring out C. get married D. forty