There’s no ________ from my bedroom window except for some factory chimneys.

(2014·福建名校质量检查)I hope the government will take more strict________against the smog that affected several big cities last winter.

Many human activities also _______carbon gases, which will result in global warming.

Mr. Huang will ________ in the movement.

Maybe there are some things among the girl's papers, like her school reports, old photos and so on. Can you ______them and give me whatever you find .