Children are amazing language learners! They are able to pick up new languages quickly and easily, without any accent(口音)．Adults, on the other hand, have to study hard to learn another language, and then they usually never lose their native accents．Why? What makes children different?
One explanation(解释)has to do with the muscles(肌肉)that control the movement in our mouths．In our mouths, there are hundreds of muscles that control the movements of our tongue, lips, cheeks, and so on．In children, their muscles are still flexible(灵活的), so it is easier for them to move their mouths into new positions(位置)to make new sounds．In adults, the muscles are less flexible, so it's more difficult for them to make sounds that aren't in their native language．
Another explanation has to do with our brains．There are two sides to our brains－the left side and the right side．In adults, each side of our brain helps us to do different things．For example, the left side of our brain helps us to think through problems step by step, while the right side helps us to remember things we see, hear, and feel．In children, however, the brain isn't yet divided(在两者划分界线)into a left and right side．Some researchers believe that this helps children to be more flexible language learners．In other words, their brains are more open to differences in a new language．
(1)
According to the passage above, children learn languages ________ than adult．
[ ]
A．
more easily
B．
less easily
C．
more correctly
D．
much more slowly
(2)
The muscles in children's mouths are ________．This allows them to make new sounds easily．
[ ]
A．
long
B．
flexible
C．
different
D．
young
(3)
There are two sides to an adult brain, and each side helps to ________．
[ ]
A．
become flexible language learners
B．
think through problems
C．
make decisions
D．
do different things
(4)
A child's brain is ________．
[ ]
A．
divided into a left and a right side
B．
not vet divided into a left and a right side
C．
going to develop into a left-sided brain
D．
going to develop into a right-sided brain
(5)
Which one of the following statements is true?
[ ]
A．
It is hard for an adult to study a new language while not losing his native accent．
B．
Children can learn a language more easily because their brains develop very fast．
C．
Children can become flexible language learners when they grow up．
D．
Adult's brains are more open to different languages．
A plant makes its own food in its leaves. Water comes to the leaves through the roots (根). Air gets into the leaves through very small holes. The green coloring in the leaves uses the water and air to make food for the plant. It also needs sunshine because a plant can make food only when the sun is shining.
Animals and people could not live without green plants. They both eat plants. People and some animals also eat the meat of some animals, and these animals eat plants.
(1)
A plant gets food from its leaves.
( )
(2)
The sun uses the water and air to make food for the plant.
( )
(3)
A plant has very small holes in its leaves for water to come in.
( )
(4)
A plant can make its food when it is a sunny day.
( )
(5)
From the article we know that people can’t get food without animals.
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