21. The winning of hosting _______ 2010 World Expo is _______ victory not only for Shanghai residents, but for ___________ people of the whole Chinese nation.
He ___ estimated the cost of the product and found that it might cost 10,000dollars or so.
___ to accept his offer, she politely said that she could manage it by herself.
To ___ the puzzlement of the students, the teacher explained it once again to them.
___ the smell of the meat, the dog ran into the room very quickly.
___, Nathan gave back the enormous amount of money he found.