. ____ I am concerned, we should be brave and we will reach the top of the hill at last ____ we try our best to climb the hill.
The world is changing fast.I strongly believe that one will easily fall behind _______ he keeps on learning.
The traffic is very_______.It’s quicker to walk there.
He has read two novels _______.
—I think he is very wise.—No, he is _______ than wise.
Your sister is _______ too young to learn Russian.