(2012·安徽) 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.
Jane didn't say_________she would return, but I suppose she'll be back for dinner.
What an accident! If the driver_________ carefully, things would not be as they are.
The price_________recently. I wonder whether it will remain so.
What I said and did at your house last night_________just between you and me.
He waited with his companion_________the rescuers came, and then helped them carry her back down the mountain.