—Tom,did you break the vase I bought yesterday?—It was not my .The floor was so slippery that I fell down and knocked it off the table.
After a knock at the door, the child heard his mother’s voice ______ him.
Pop music is such an important part of society ______ it has even influenced our language.
The little boy came riding full speed down the motorway on his bicycle. ______ it was!
With the help of high technology, more and more new substances ______ in the past 10 years.
—Sorry, I made a mistake again. — ______. Practice more and you’ll succeed.