Read the text and fill in the gaps with the correct form of verbs as per subject and context.

Tigers (a)--- (know) as ferocious animals. But they hardly (b) --- (kill) any animal when they are not hungry. Usually the tigers (c) ---- (reside) in the deep forest. They are hardly (d) --- (see) in the open unless there is a strong necessity. They often remain (e)-- (hide) under the deep green in search of their prey. Whenever they (f) ---(discern) any prospective prey, they take a pose to (g) ---- (fall) upon it. Tigers often (h) --- (unite) themselves to (i)----(attack) their prey from different directions. An adult tiger (j)--- - (devour) 20 to 30 kilograms of meat at  a single meal. Tigers' paws (k)--- - (cushion), so a big tiger can (l) --- (walk) through the driest leaves without (m)----(create) a single crackle. As a result, the victim (n) - ---(have) the slightest warning of the tigers approach.