Some personal characteristics play a vital role in the development of one's intelligence.

But people fail to realize the importance of cultivating these factors in young people.

The so-called "non-intelligence factor" include 【21】______ feelings, will, motivation, interests and habits. After a 30-year follow-up study of 8,000 males, American psychologists 【22】______ that the main cause of disparities in intelligence is not intelligence 【23】______ , but non-intelligence factors including the desire to learn, will-power and self-confidence.

【24】______ people all know that one should have definite objectives, a strong will and good learning habits, quite a number of teachers and parents don't pay much attention to 【25】______ these factors.

Some parents are greatly worried 【26】______ their children fail to do well in their studies. They blame either genetic factors, malnutrition, or laziness, but they never take 【27】______ consideration these non-intelligence factors. At the same time, some teachers don't inquire into these, such as reason 【28】______ students do poorly. They simply give them more course and exercises, or 【29】______ rebuke or ridicule them. After all, these students lose self-confidence. Some of them just feel defeated and 【30】______ themselves up as hopeless. Others may go astray because they are sick of learning. 【31】______ investigation of more than 1,000 middle students in Shanghai showed that 46.5 percent of them were 【32】______ of learning because of examination, 36.4 percent lacked persistence, initiative and conscientiousness and 10.3 percent were sick of learning.

It is clear 【33】______ the lack of cultivation of non-intelligence factors has been a main 【34】______ to intelligence development in teenagers. It even causes an imbalance between physiological and 【35】______ development among a few students.

If we don't start now to 【36】______ the cultivation of non-intelligence factors, it will not only obstruct the development of the 【37】______ of teenagers, but also affect the quality of a whole generation. Some experts have put forward 【38】______ about how to cultivate student's non-intelligence factors.

First, parents and teachers should 【39】______ understand teenage psychology. On this basic, they can help them to pursue the objectives of learning, 【40】______ their interests and toughening their willpower.

【21】

A．one's

B．their

C．his

D．her