Historical experience can as a most important source of information.
---So why didn’t you meet us on Saturday then? ---I’m sorry about that--- I _________ --- I thought you were meeting next Saturday.
Next door to ours _________, who has just return from abroad.
We are tired of doing ________ homework every day; most of _______ is of no use but of mechanical drill.
The policeman stopped him when he was driving home and ______ him ______ speeding.
—Are there any English story books for us students in the library? —There are only a few, ______.