oned you yesterday morning. A girl answered, butI didn’t recognize the voice.— Oh, it __________ my younger sister. She was in myroom at that moment.

This is _____ book. It is ____ English book.

Tom _______ 280 yuan for this bike last week.

Have you found the poor dog yet— Yes. But he was _______ when we found him. The bad weather killed him.

The computer was used in teaching. As a result，not only _____，but students becamemore interested in the lessons.