V: Hello, sunny!
S: Hai, Venna.Long time no see.
V: I heard you had a serious headache.Are you OK?
S: Doctors say it may caused by the air pollution in thenewly-decorated dormitory.
V: What does the doctor say?
S: The doctor suggested I should away from pollution and have more outdoor exercise.
V:Oh,the environmental pollution has become a threat to human survival .
S: I went a global warming rally in Urumqi last weekend. It was fantastic to be around so many people who care about the environ