I can’t remember how many years ago _____ a fight broke out between the husband and the wife.
________ the program, I’m beginning to understand my Chinese roots and I have so many memories of China to take with me. [ ]
The book is the most difficult ______ the three. [ ]
The Great Wall is __________ tourist attraction that millions of people pour in every year.
The girl is often heard _______ in the next room.