Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.
A newborn baby can see, hear and feel. By the age of five, a child can talk, ride a bike and invent imaginary friends. How does this development happen? We don't understand the way language, thinking and planning develop very well. Now scientists are using new technology to ‘see’ into children's brains. And they are discovering new information about the way a baby's brain develops.
A study in 2010 showed that the experiences a child has in their first few years affect the development of the brain. It showed that children who received more attention often had higher IQs. The brain of a newborn baby has nearly a hundred billion neurons. This is the same number as an adult's brain. As they grow, a baby receives information through the senses of sight, hearing, smell, taste and touch. This information creates connections between different parts of the brain. At the age of three, there are a hundred trillion connections.
One experiment looked at images of babies' brains while they were listening to different sounds. The sounds were in different sequences. For example, one sequence was mu-ba-ba. This is the pattern ‘A-B-B’. Another sequence was mu-ba-ge. This is the pattern ‘A-B-C’. The images showed that the part of the brain responsible for speech was more active during ‘A-B-B’ patterns. This shows that babies can tell the difference between different patterns. This experiment is interesting because sequences of words are important to grammar and meaning. Compare two sentences with the same words in a different order: ‘John killed the bear’ is very different from ‘The bear killed John.’ So babies are starting to learn grammatical rules from the beginning of life.
Researchers also know that babies need to hear a lot of language in order to understand grammar rules. But there is a big difference between listening to television, audio books or the internet, and interacting with people. One study compared two groups of nine-month-old American babies. One group watched videos of Mandarin Chinese sounds. In the other group, people spoke the same sounds to the babies. The test results showed that the second group could recognise different sounds, however the first group learned nothing. The scientist, Patricia Kuhl, said this result was very surprising. It suggests that social experience is essential to successful brain development in babies.
What is the main conclusion from the study described in the last paragraph?
A.Babies can understand television at the age of nine months.
B.Social interaction has a big influence on the brain.
C.Watching videos is a good way to develop a child's brain.
D.Mandarin Chinese is not too hard to be learned for American babies.

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Fill in each numbered blank with one suitable word or phrase.
On December 10, 2006, I was going through some hard time. The landlady did not want to release the house any more so I had to (41) _____ and only had one month to find a place. Because Christmas was coming and it was difficult for me to (42) _____ a suitable accommodation. I had only some money (43) _____. I could not buy a Christmas tree and some presents for my three boys, (44) _____ I had to use the money to find a place to live. Tome, it broke my heart as I could not prepare the Christmas for my three boys. I have been their only parent since my husband (45) _____ away two years ago. I was so sad and everything was getting on my nerves. Although I managed to solve the problem myself I could not help (46) _____ my sons about the things. When I suddenly woke up at midnight, I found my eldest son was sitting (47) _____me. He kissed me and said, "Don't worry, Mum. We love you very much and always stand by you (48) ____ happens." At the moment I started weeping, grabbed him and kissed him. His words and love made me (49) _____ all about what I was stressing about.
In fact ever since that moment, I have realized that I can overcome any problems thanks to my sons' love. The most important thing of my life is that my boys are safe and healthy, and they bring me joy all the time. The memory (50) _____ me that nothing really matters, when I have the love of my children.
(43) _____
A.leave           
B.to leave
C.leaving
D.left