People here see this kind of bird as a _______ of hope, so they never shoot them.
A lot of language learning,________ has been discovered,is happening in the first year of life,so parents should talk much to their children during that period.(2012·安徽,29)
The air quality in the city,________ is shown in the report,has improved over the past two months.(2012·福建,23)
—What do you think of teaching,Bob?—I find it fun and challenging.It is a job ________ you are doing something serious but interesting.
It's helpful to put children in a situation ________ they can see themselves differently.
Whatever is left over may be put into the refrigerator,________ it will keep for two or three weeks.(2011·安徽)