However weak we are, we can still do something against the powerful nature as long as we are ______ prepared.
We must take measures to protect the environment from ______.
---Will you come with me to see a film? ---Well,________, but I will try my best.
With the development of high technology, more and more new things _______ to the field of IT.
The dog was killed by the boss of this restaurant without _______.
The joke the naughty boy _______ his teacher made many people angry.