Ittakesplentyoftimeforsomeadultstotrytostopchildrenplaying．Theyareusuallypeoplewhothinkofplayasbeingthe（41）___ofworkandthereforeawasteoftime．Forhumans，workisawayofgettingfoodtoeat，andlikehumans

　　It takes plenty of time for some adults to try to stop children playing．They are usually people who think of play as being the （41）___ of work and therefore a waste of time．For humans，work is a way of getting food to eat，and like humans，（42）___ must spend time doing the（43）___ things．Regardless of this，children （44）___ playing，and so do other young animals．It is quite （45）___ to keep both a small child and a young cat （46）___ for hours with a piece of paper．

　　Hunting may be the most obvious skill（47）___ in play，but it is far from being the only one．Lambs and goat kids play （48）___，although as adults they will never （49）___ anything other than some grass．But for these young animals too，（50）___ is an important part of learning．Sheep and goats are （51）___ hill and mountain animals．Running and skipping exercise young legs and develop a strong sense of （52）___ that will keep them safe on the steepest rocks．

　　（53）___ animals'play，children's play is not so different．（54）___ trees and catching flies are not the most obvious training for the adult world，but the flexibility （55）___ in these activities is similar to that required of a bus driver or businessman．

　　What we know about animals shows us that playing is a very good way of （56）___，so maybe one of the best ways for （57）___ to learn is also by playing．Children find playing is fun，but （58）___ notice that they are also learning at the same time．Most people continue to play games long after they have become （59）___，and perhaps that is because we rely so much on our （60）___ to learn．

　　41．A．rewardB．basisC．natureD．opposite42．A．childrenB．animalsC．parentsD．cats43．A．dullB．ordinaryC．sameD．chief44．A．enjoyB．regretC．delayD．ignore45．A．necessaryB．possibleC．reasonable