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 (e) ——— (to be) a strong necessity. They often remain ( (f) )—— (hide) under the deep green in search of the prey. Whenever they (g) ——— (discern) any prospective prey, they take a pose to (h) ——— (fall) upon it. Tigers often ( ( i ) ) ——— (unite) themselves to ( (j) )——— (attack) their prey from different directions. An adult tiger ( (k) )———— (devour) 20 to 30 kilograms of meat at a single meal. In our Sundarbans the number of tigers (l) ———— (decrease) day by day. Poaching and illegal trafficking ( (m) )———— (to be) the main reasons of decrease. So the concerned authority should be committed to ( ( n ) ) ———— (take) action to protect the tigers.