Respond to each of the following situations :

1_ You have just been introduced to Mr Stone , who you have not met before . What do you say ?

2_ Someone your father has worked with in the past has just arrived in your country . Your father meets him at the airport . What does your father say to him ?

3_ You have just met an old friend who you have not seen for six months . You want to know about this friend's activities in that time . What do you say ?

4_ A friend asks you why you have recently started playing squash . You like squash and you believe it is good for your health . What do you say ?