24. He apologized for his mistake, saying that he ___________no offence.
Not until I had arrived home______ my appointment with Michael Smith.
______ lots of times, the song doesn’t sound as nice as before.
Bill Gates has created a wonderful “window”, ______ people can surf the Internet freely.
You will make some progress in your study of English ______ you keep more words in mind.
--- Excuse me, I wonder if you can help. I have lost my ID card.---- But where______ you______ it?