The limits of a person's intelligence, generally speaking, are fixed at birth, buthe reaches these limits will depend on his environment.
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.