______the atmosphere around our Earth, we would not be able to live.A．Had it not been forB

He ______ forever ______ about the friendly people, the clean atmosphere, the closeness to

The atmosphere ______ of certain gases mixed toge

The automobile parts e requested for our customer got here on__________.

The automobile parts e requested for our customer got here on__________.

Our companys service is ______ in nearly 80 countries around the world.A.availableB.natur

Man must stop ___ the earth’s atmosphere.