Man must stop ___ the earth’s atmosphere.

Just as the soil is a part of the earth,______the atmosphere.A．at it isB．the same isC．so i

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

One major ______ of space travel is the radiation that exists beyond Earths atmosphere.A．m

The sun must be made of lighter stuff than the earth. If the earth were______, it would we

We must stop （) the earth’s atmosphere

Just as the soil is a part of the earth ______ the atmosphere.A.as it isB.so isC.the same