A:便笺/歼灭契约/锲而不舍瓜熟蒂落/啼笑皆非
B:咽喉/呜咽贻误/百战不殆功亏一篑/振聋发聩
C:伫立/抽搐蛊惑/余勇可贾强词夺理/强弩之末
D:拓本/落拓对峙/有恃无恐焚膏继晷/咎由自取
Some false advertisements are taking the countryside women as their targets, because they are easy to________.
400÷20=____
390+56=____
45×30=____
150×6=____
20+80×4=____
540-190=____
24×50=____
201×4=____
6000÷30=____
9+9×10=____