It’s not easy to change habits,________ with awareness and selfcontrol,it is possible. (2013·重庆,23)
You should made it a rule to leave things _______ you can find them again.
In time of serious accidents, _______ we know some basic things about first aid,we can save lives.
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 _______.