In copying this paper, be careful not to leave _______ any words.
Look ! The building which _________now will be used as a library.
The floor is dirty and it requires _________.
Up to now, the little boy is still unable to _______ to us what he meant just now.
Going to _______ Taiwan for holiday is _______ enjoyable and exciting experience for most people from the mainland of China.
--How are the things in your village? --Modern farming methods have been brought ______ and the villagers are _______ now than before.