Professor Tang didn't give us a speech today.It was ________ he had a traffic accident on the way to school.
I ________ thank you too much for all your help to my son while we were away from home.
We ________have bought so much food now that Suzie won’t be with us for dinner.
We had a party to ________ Mother’s silver wedding.
The book is neither yours nor mine. Whose ________ it be?
On National Day, people sing and dance to ________the birth of our country.