A、BECAusE thEy’rE quitE imprEssivE with A strong EFFECt.
B、BECAusE thEy ArE not so FrustrAting As othEr ExprEssions.
C．BECAusE thEy ArE prACtiCED AnD rEpEAtED onCE AnD AgAin.
D．BECAusE thEy ArE most pEoplE’s FAvoritE worDs.