1.Teenagers are a peculiar breed of humans. They are fickle and touchy, yet sensitive and caring. They 2.are not longer children, but are not yet adults either. 3.A once loving and obedient child can transform into a rebellious, sullen teen. What accounts for this 4.change? The problem, claim some doctors, lie in the physical aspect of the person. A teenager's 5.hormones wreak havoc within their body. Noticeable physical changes about  what the teen may feel 6.uncomfortable occur. In trying to solve with these changes, the last thing the teen needs is parents 7.invading his privacy or treating him like a child. Therefore, the problem is, in fact, accounted for by 8.something deeper than mere physical changes. The teen is not only developing his body, he is also 9.developing emotionally. For ...... first time in his life, he may be painfully aware of the opposite sex. The 10.teenager is also vulnerable with puppy love and crushes, the sure signs of growing up. He also 11.becomes defensive and secretive about his own actions. Teenagers should be given a certain 12,number of freedom to explore their emotions and authority. Parents need not be overly alarmed by 13,their strange and unexplicable mood changes. After all, isn’t that all part of growing up?

1/not⇒no

2/lie⇒lies

3/their⇒his

4/about⇒occur

5/what⇒which

6/occur⇒about

7/solve⇒cope

8/is⇒are

9/therefore⇒However

10/his⇒bỏ

11/......⇒the

12/with⇒to

xin hay nhất ạ 

1 not `⇒` no

2 lie `⇒` lies

3 their `⇒` his

4 about `⇒` occur

5 what `⇒` which

6 occur `⇒` about

7 solve `⇒` cope

8 is `⇒` are

9 therefore `⇒` However

10 his `⇒` ∅

11 a `⇒` the

12 with `⇒` to