Are some people born clever, and others born stupidly? 【S1】______ Or is intelligence developed by our environment and our experiences? To some extent our intelligence is given us at birth,and no amount of special education can do a【S2】______ genius out of a child born with low intelligence.On the other hand, a child who lives in a bored environment will develop his 【S3】_____ intelligence less than one who lives in a rich and varied surroundings.Thus the limits of【S4】______ a person's intelligence are fixed at birth, whether or not he reaches those limits will depend on their environment. This view, now held by most experts, can be supported in 【S5】 ______ a number of ways.It is easy to show that intelligence is at some extent something we are【S6】 ______ born with. The closer the blood relationship between two persons, the closer they are like to be in intelligence.Thus if we take two unrelated people at random from 【S7】______ population,it is likely that their degrees of intelligence will be complete different.If on 【S8】______ the other hand we take two identical twins,they will very likely be as intelligent as each other. Relations like brothers and sisters, parents and children usually have different 【S9】______ intelligence. This conclusion is also suggested by the fact that people who live in close contact with each other,but who is not related at all,are likely to have similar degrees【S10】______ of intelligence. 【S1】