What's the Key sentence of Para.1?
A.
It is a beautiful day here and I am sitting under the big tree at the end of the garden.
B.
It seems amazing that at my age I am still fit enough to cycle 20 kilometres in an afternoon.
C.
It's my birthday in two weeks time and I'll be 82 years old!
D.
I think my long and active life must be due to the healthy life I live.