2: For fifteen years.
3: How long did your father work in the bank?
4: For five years.
5: How long have you had the same hairstyle?
6: Since I was about six.
7: How long have you known your best friend for?
8: For three years.
9: How long did your class study english for?
10: Since we were at primary school.
In the definition to tentative the synonym list had preliminary in it. So the answer is C.<span />
Answer:
Riding a bicycle and playing piano.
Explanation: she began riding a bicycle and playing piano