It is said that bad living habits as well as dirty surroundings, stuffy rooms and some other factors ________ the wide spread of H1N1.
She says that she'll have to close the shop ________ business improves.
While ______ himself in the newspaper in a cafe , he got his pocket picked.
— Can you explain ____ you have been late for school several times this term?— Sorry, but it is the first time that I have been late this week.
Nowadays it seems to some of us that it is feeling, not just money, that is what really ________.
When doing my homework,________.