Most people think that the older you get, the harder it is to learn a new language. That is, they believe that children learn more easily and efficiently than adults. Thus, at some point in our lives, maybe around age 12 or 13, we lose the ability to learn languages well. Is this idea a fact or myth(悬念)？
Is it true that children learn a foreign language more efficiently than adults? On the contrary, research studies suggest that the opposite may be true. One report, on 2,000 Danish children studying Swedish, concluded that the teenagers learned more, in less time, than the younger children. Another report, on Americans learning Russian, showed a direct improvement of ability over the age range tested; that is, the ability to learn increased as the age increased, from childhood to adulthood.
There are several possible explanations for these findings. For one thing, adults know more about the world and therefore are able to understand meanings more easily than children. Moreover, adults can use logical(逻辑的) thinking to help themselves see patterns in the language. Finally, adults have more self-discipline (self-control) than children.
All in all, it seems that the common idea that children are better language learners than adults may not be a fact, but a myth.
The main idea of the passage is that         .

A．teenagers are more difficult to teach

B．Danish teenagers can learn Swedish faster than younger children

C．adults are more logical than children

D．the ability to learn languages increases with age

If most people’s idea of learning languages is true, people may lose ability to learn languages well         .

A．at an early age	B．when they reach their twenties
C．at an old age	D．after they become young men

According to the passage, teenagers can learn a foreign language __________ than younger children.

A．harder

B．more efficiently

C．more slowly

D．more carefully

The reason why adults understand meanings more easily than children is that         .

A．adults have more self-discipline

B．adults like to play more than children

C．adults have more knowledge than children

D．adults accept new things more easily than children

The explanation for older student’s better achievement not mentioned in the above passage is that       .

A．adults know more about the world.	B．adults can use logical thinking
C．adults have more self-discipline.	D．adults can read better.