7. Which is true about this reading?
(A) People should do outdoor activities when the government calls a red alert.
(B) Few people have interest in Zou’s pictures, so he has to find another way to catch people’s eye.
(C) Zou thinks that air pollution is the business of the Chinese government and all people.
(D) The Chinese government asked Zou to take photos of sky in Beijing to show people the seriousair pollution.