The two reputable hydrogeologists drafted some highly optimistic projections-with the______that these were speculative and should of course be tested.

A． potato : tuber
B． cactus : spine
C． melon: gourd
D． bud : stalk
E． grove : timber

A． liqueur : blameless
B． passion : blithe
C． polish : inauthentic
D． tact : offensive
E． pomp : barbaric