A.   “It’s raining cats and dogs”? The 49._____ probably doesn’t make sense to you when you first hear it.Although sayings like this are not 50._____ in meaning, searching for their origins could help us get theirdefinition. Another confusing phrase is anything that “costs an arm and a leg”. Since a person’s 51._____ limb is generally his right hand, he would 52._____ that for something he really desires.Moreover, “straight” from the horse’s mouth” is used to describe something 53._____ enough for others to believe in. In ancient times, dishonest horse traders would lie about a horse’s age for a higher price. However, smart buyers would get to know the horse’s real age by checking its teeth. Such usages do add a color to the English language.
(A) sacrifice
(B)obvious
(C) dominant
(D) truthful
(E)expression

【題組】49