A person who believes that he is incapable will not make a r

A person who believes that he is incapable will not make a real effort,because he feels that it would be useless.He won’t go at a job with the confidence 21 for success.He is therefore 22 to fail,and the failure will strengthen his belief in his incompetence.
Alfred Adler,a famous doctor,had an experience 23 illustrate this.When he was a small boy he was poor at arithmetic.His teacher got the idea that he had no ability in arithmetic,and told his parents what she thought in order that they would not expect 24 much of him.25 this way,they too developed the idea,“Isn’t it too bad that Alfred can’t do arithmetic?” He accepted their mistaken estimate of his ability,felt that it was 26 to try,and was very poor at arithmetic,just as they expected.
One day Adler succeeded in solving a problem which 27 of the other students had been able to solve.This gave him confidence.He 28 the idea that he couldn’t do arithmetic and was determined to show them that he could.His new 29 confidence stimulated him to go at arithmetic problems with a new spirit.He now worked with interest,30 ,and purpose,and he soon became extraordinarily good at arithmetic.
21.A.well B.necessary C.in D.good
22.A.possible B.possibly C.likely D.like
23.A.to B.when C.what D.which
24.A.too B.very C.so D.that
25.A.On B.In C.By D.From
26.A.important B.useful C.useless D.necessary
27.A.any B.none C.each D.no
28.A.accepted B.developed C.rejected D.thought
29.A.found B.finding C.find D.founded
30.A.love B.feelings C.determination D.solution

21.A
22.C
23.D
24.A
25.C
26.C
27.B
28.C
29.A
30.C
Hope that I am able to help you out.