Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank before the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please write down the corresponding letter for each item in the blanks. You may not use any of the words in the bank more than once.A) rewards E) avoid I) deliberately M) obsessively B) unhealthy F) symbolic J) profit N) identity C) awesome G) lively K) disapprove O) demonstrate D) emerged H) occur L) rebel There are very few perfectly behaved teenagers. Many of them take part in some kind of dangerous, __26__ or anti-social pursuit.Rebelling in teenagers is often __27__. They want to look grown up and impress their friends. If parents __28__, it often makes teenage behavior worse and arguments are common. They defy adult restrictions __29__ as a way of asserting their independence.Risky behavior is seen by adults as being a "bad" thing, but for the teenagers there are many __30__. By pushing boundaries they are developing their __31__ as well as showing off in front of friends. There are suggestions from recent research that some bad teenage behavior could be a sign of a healthy personality.There is one reason why teenagers might __32__. Scientists have used advanced scanning methods to study the changes that__33__ in the adolescent brain. Much to their surprise, they have discovered that the brain continues to develop and grow well into the teenage years.This might explain a teenager's risk-taking behavior. It has __34__ that the emotional region of the brain develops to maturity ahead of the part of the brain that controls rational thought. In other words, teenagers have well-developed emotions and feelings but have still not acquired the ability to think things through. When they act impulsively, and do the kind of dangerous things an adult would __35__, their brain's late development might be to blame.