More and more attention has been drawn to the fact that many children are ________ in the countryside when their parents flood into the cities for jobs.

Mr Johnson always carries a notebook,in which he  _______ everything that happens．

 The patient was in bad need of operation but there was no guarantee(保证) that she would survive the anaesthetic (麻醉剂), which made the doctors on the horn of a __________.

We have ________ in your bill the cost of the teapot you broke just now.

The directions for operating this machine were so ______ that we could not understand.