Question 7
Choose the correct letter, A, B, C or D.
Write your answer in box 7 on your answer sheet.

Which of the following is NOT given as a symptom of premature aging（）

A．water quality
B．seasonal change
C．saturated soil
D．safe places
E．quite low
F．quite high
G．nutrients
H．nurseries
I．international recognition
J．farming activity
K．extinct
L．continued existence
M．commercial development
N．at risk