It is said that bad living habits as well as dirty surroundings, stuffy rooms and some other factors ________ the wide spread of H1N1.
I’m not sure whether this is the room ________ she left her dictionary.
The population of China is _______ than that of America.
By the time she ________ home, her parents will have prepared some delicious food for her.
During the scientific experiment, Mr. Chen carefully poured the water into the tube, with my classmates _______ beside to see what would happen.
I don’t think she will come to the meeting on time, _________?