They say that _______ a lot of water is good for you.
The man showed us such a heavy stone ________ no one could lift it.
The number of the audience,________ we had expected,was well over one thousand.
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.