In the forest____, who made no contact with the outside world

How many are there in your class

The zoo worker told the visitors that in the case of a highly ________ animal,performance training is easy and not so painstaking. [ ]

_ is known to us, the dragon stands for China______the bear symbolizes Russia.

What should I buy here –If you have friends who smoke, Winston is a well-known ____ of cigarette here.