There are not enough facts to () a genuine debate of animal awareness.

It is found that many Americans are not doing enough to care _____ their teeth.A、／B、f

Some well-known scientists believe that there is not enough oxygen on Mars to ______ human

They are such a big family that this new house is not______ for them to live in.A．enough l

Why cholesterol levels in people are higher in winters？A．Because there is not enough vitam

If the population keeps on growing, there will eventually not be enough resources left to

Some well-known scientists believe that there is not enough oxygen on Mars to ______ human