A:Is that Jack?
B:（1）______.Jack is a little shorter than John.
A:Are they twins?
B:（2）______.They look almost the same.And they are my best friends.We have the same hobbies（爱好）.
A:Then（3）______?
B:We all enjoy playing the guitar.
A:（4）______?
B:Yes,I am.I\’m more serious than them.
A:（5）______?
B:Jack and I want to be pop singers,and John wants to be a doctor when we grow up.