Most people have no idea of the hard work and worry about going into collection of those f

ascinating birds and animals that they pay to see in the zoo. One of the questions that is always asked of me is【C1】______I became an animal collector in the first【C2】______. The answer is that I have always been interested in animals and zoos. According to my parents, the first word I was able to say with any【C3】______was not the conventional "mamma" or "daddy",【C4】______the word "zoo", which I would【C5】______over and over again with a shrill【C6】______until someone, in order to【C7】______me up, would take me to the zoo. When I grow a little older, we lived in Greece and I had a great【C8】______of pets,【C9】______from owls to seahorses, and I spent all my spare time【C10】______the countryside in search of fresh specimens to【C11】______to my collection of pets.【C12】______on I went for a year to the City Zoo, as a student【C13】______, to get experience of the large animals, such as lions, bears and ostriches,【C14】______were not easy to keep at home. When I left, I【C15】______had enough money of my own to be able to【C16】______my First trip and I have been going【C17】______ever since then. Though a collector' s job is not an easy one and is full of【C18】______, it is certainly a job which will appeal【C19】______all those who love animals and【C20】______.

【C1】

A．how

B．where

C．when

D．whether