(2012安徽卷)Alot 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.
He went to the library ____ last night, but you broke your word.
We have to __________finding a solution.
His aunt’s letters ___of those beautiful days when they used to live together in his hometown.
When seeing a stone in front of the car, _____.
Smith wrote an article on ____ he failed to pass the exam.